Michigan cannabis rules for visitors

Adults 21 and older may possess, carry and buy up to 2.5 ounces of marijuana, of which no more than 15 grams may be concentrate, and may keep up to 10 ounces at home, where anything over 2.5 ounces must be locked up (MCL 333.27955, 333.27954). The same 2.5-ounce and 15-gram caps apply to each retail transaction (Mich. Admin. Code R 420.506), and the numbers are the same for residents and visitors. An adult may also give up to 2.5 ounces to another adult, as long as no payment changes hands and the gift is not advertised; these limits have not changed since the voter-initiated law took effect on December 6, 2018.

Bring a valid driver's license or government-issued photo ID that proves you are 21; Michigan sets no residency rule for adult-use buyers (R 420.505). Use cannabis only on private property where the owner allows it: the Act does not authorize consuming in a public place, a driver may not consume at all, and no one may smoke in the passenger area of a vehicle on a public road (MCL 333.27954), and public use carries a civil fine of up to $100 (MCL 333.27965). Hotels may ban cannabis, licensed delivery goes only to residential addresses and consumption establishments, and flights out of DTW, the Sleeping Bear Dunes and Pictured Rocks national lakeshores and the Ontario crossings fall under federal or Canadian law, where adult-use marijuana remains illegal.

The regulator is the Michigan Cannabis Regulatory Agency (CRA), Department of Licensing and Regulatory Affairs. Check any shop's license on the state license lookup before you buy.

Adults 21 and older may possess, use, buy and transport up to 2.5 ounces of marijuana, and no more than 15 grams of that may be in the form of concentrate (MCL 333.27955). The rule is the same for residents and visitors: the Act protects 'a person 21 years of age or older' and sets no separate limit for people from other states or countries. At a residence the ceiling rises to 10 ounces, plus whatever the household's own plants produce, but any amount above 2.5 ounces kept at home must be stored in a container or area with locks or other security devices (MCL 333.27954).

Store purchases follow the same caps. A licensed retailer may not sell or transfer more than 2.5 ounces to an adult in a single transaction, and no more than 15 grams of that may be concentrate; a store may also sell no more than 3 immature plants per transaction (Mich. Admin. Code R 420.506). The rules set a per-transaction ceiling for adult-use buyers rather than a daily one, but the possession limit still applies to everything you carry, so a second purchase that takes you past 2.5 ounces leaves the Act's protection.

Gifts are legal within limits. An adult may give away or otherwise transfer up to 2.5 ounces, including no more than 15 grams of concentrate, to another person 21 or older, as long as there is no payment and the transfer is not advertised or promoted to the public (MCL 333.27955). Adults may also help another adult with any of the activities the Act allows, and the use, purchase and possession of accessories such as pipes and papers is authorized for people 21 and older. The medical program runs on separate rules.

These numbers come from the voter-initiated law of 2018, which took effect December 6, 2018 after Proposal 18-1 passed 2,356,422 votes to 1,859,675, according to the Legislature's compiler's notes. The history line for section 5 lists only the 2018 initiated law, so the possession figures have not been amended. What changed in 2026 is the tax behind the shelf: a 24 percent wholesale tax on sales to retailers took effect January 1, 2026, in addition to the existing retail taxes (Treasury, RAB 2026-3).

You must be 21 or older. The Act does not authorize anyone under 21 to possess, consume, purchase or otherwise obtain marijuana, or anyone to transfer it to a person under 21 (MCL 333.27954), and a marijuana retailer is defined as a business licensed to sell to individuals who are 21 years of age or older (MCL 333.27953). Before any sale, the store must confirm that you presented a valid driver's license or government-issued identification card that bears your photograph and proof that you are at least 21 (Mich. Admin. Code R 420.505).

Michigan does not require residency. Section 5 of the Act protects any person 21 or older, and the rules ask for government-issued photo ID without limiting it to Michigan or U.S. documents (MCL 333.27955; R 420.505). The rules name a driver's license or government-issued identification card, so whether a store accepts a foreign passport is the store's call; ask before you go. Expect a second check if you use delivery, because the driver must verify the identity and age of the person who placed the order (R 420.207).

Stores collect little about adult-use buyers. A licensed retailer or microbusiness is not required to retain customer information other than the payment method, the amount paid, the time of sale, the product quantity and other product descriptors (R 420.505). Medical purchases work differently: the CRA says a Michigan resident can apply for a medical card at age 18, and patients must present a valid registry card and a valid driver's license or government-issued photo ID at the time of purchase (CRA Consumer Connection; CRA MMMP FAQ).

Under-21 possession of small amounts is a civil matter. A person under 21 found with no more than 2.5 ounces, or growing no more than 12 plants, faces a civil infraction with a fine of up to $100 for a first violation and up to $500 for a second, plus forfeiture; someone under 18 may do community service instead of paying the fine and must complete 4 hours of drug education or counseling the first time and 8 hours the second (MCL 333.27965). Giving marijuana to anyone under 21 falls outside the Act altogether (MCL 333.27954).

Private property with the owner's permission, and licensed consumption lounges or events in towns that allow them, are the places where using cannabis is legal. The Act does not authorize consuming marijuana in a public place, smoking it where the person who owns, occupies or manages a property prohibits it, or possessing or consuming it on the grounds of a public or private school, in a school bus or on the grounds of a correctional facility (MCL 333.27954). It also lets any person prohibit or regulate consumption on property they own, occupy or manage, and employers may ban it at work and on their premises.

The Act does not define 'public place' (MCL 333.27953), so treat any space open to the public as off-limits: downtown sidewalks in Detroit, Ann Arbor, Grand Rapids and Traverse City, city parks and beaches, stadium plazas, bars and restaurants. The one statutory exception is an area designated for consumption inside a municipality that has authorized such areas and keeps them closed to people under 21 (MCL 333.27954), which in practice means a licensed designated consumption establishment or a licensed temporary event (MCL 333.27956; Mich. Admin. Code R 420.21).

The penalty for public use is modest but real. A person 21 or older who holds no more than the legal amount but uses it in a way the Act does not authorize, such as in public, is responsible for a civil infraction with a fine of up to $100 and forfeiture of the marijuana, and section 15 says such a person may be punished only as it provides (MCL 333.27965). That cap does not cover driving under the influence, consuming while driving, smoking in a vehicle on a public way, school grounds or transfers to people under 21, which other laws reach.

Michigan's Smoke-Free Air Law does not settle the question indoors, because it defines smoking as burning a cigar, cigarette, pipe or other substance that contains a tobacco product (MCL 333.12601). Indoor rules for cannabis therefore come from the Act and from the owner or manager, who may prohibit smoking or any other consumption on the property (MCL 333.27954). Renters get one protection: a lease may not prohibit a tenant from lawfully possessing marijuana or consuming it by means other than smoking, so a landlord may ban smoking but not edibles.

Only if the hotel allows it. A guest room is private space, but the Act lets any person prohibit or otherwise regulate the consumption of marijuana on property the person owns, occupies or manages, and it does not authorize smoking marijuana where the owner or manager prohibits it (MCL 333.27954). So the hotel's own policy decides, in Detroit or anywhere else in the state, and its house rules or front desk can say what it allows.

Michigan's statewide smoking ban does not reach cannabis on its own. The Smoke-Free Air Law defines smoking as the burning of a lighted cigar, cigarette, pipe or other matter that contains a tobacco product (MCL 333.12601), so the hotel's policy, not that law, decides whether you may smoke or vape cannabis in a room. Edibles avoid smoke and odor, but the Act allows an owner to regulate any consumption, not only smoking, so a hotel may ban those too (MCL 333.27954).

Lobbies, hallways, pools, rooftop bars and hotel restaurants are open to other guests and the public, so using cannabis there is consuming in a public place, which the Act does not authorize; the civil fine is up to $100 (MCL 333.27954, 333.27965). A hotel is also an awkward delivery address: the rules let licensed stores deliver only to an adult at a residential address or at a designated consumption establishment given when the order was placed, and they do not mention hotels (Mich. Admin. Code R 420.207).

Short-term rentals work the same way: the owner or manager may prohibit or regulate cannabis on the property, and the listing's house rules govern (MCL 333.27954). For longer stays under a lease, the Act adds a tenant protection, since a lease may not bar a tenant from lawfully possessing marijuana or consuming it by means other than smoking. Campgrounds, cabins and bed and breakfasts follow their operators' rules, and state park campgrounds are covered in the section on federal, state and tribal land below.

Yes, but only as licensed designated consumption establishments, and only in towns that allow them. The CRA licenses a designated consumption establishment as a commercial space where adults 21 and older may consume marijuana products at the address on the state license, and the license is valid for 1 year (Mich. Admin. Code R 420.1, R 420.21). A municipality must opt in: the Act lets it authorize the sale of marijuana for consumption in designated areas closed to people under 21 and at special events, and only such an area falls outside the Act's public-place rule (MCL 333.27956, 333.27954).

They are rare. The CRA's monthly report counted 5 active designated consumption establishment licenses statewide as of February 28, 2026, against 835 active retailer licenses (CRA Monthly Report, February 2026). Detroit's licensing ordinance provides for up to 15 designated consumption lounge licenses plus 15 equity lounge licenses, which is a cap, not a count of open lounges (Detroit Ordinance No. 2022-11, Sec. 20-6-34). We could not confirm from a primary source which addresses hold the five state licenses, so search the CRA's Verify a License tool, which lists Designated Consumption Establishment as a license type, before you go.

Inside a licensed lounge, state rules set the floor. The establishment must have a smoke-free area where employees monitor the consumption area, a ventilation system that sends air outside through filtration sufficient to remove visible smoke and eliminate odor at the property line if inhalation is allowed, and a location physically separated from areas where smoking is prohibited (R 420.22). Ordinary dispensaries may not allow any consumption on site, while a consumption establishment or temporary event may serve food once it has any required federal, state or local approvals (R 420.203).

Events and clubs follow the same licensing line. A temporary marijuana event needs an event organizer license and a venue and organizer expressly approved by the municipality, may run from a single day up to 7 consecutive days, and allows only adults 21 and older to buy and consume, with sales confined to the designated retail area (R 420.25, R 420.27). The CRA counted 31 active event organizer licenses on February 28, 2026. Any non-residential place that charges entry, sells goods or services during consumption, or requires membership needs one of these licenses (R 420.21; CRA FAQ).

The driver may not consume marijuana at all, and no one may smoke it inside the car on a public road. The Act does not authorize operating, navigating or being in physical control of a motor vehicle, aircraft, snowmobile, off-road vehicle or motorboat while under the influence of marijuana, consuming marijuana while doing so, or smoking marijuana within the passenger area of a vehicle upon a public way (MCL 333.27954). That covers rental cars, taxis and Uber or Lyft rides, and the vehicle's owner may set stricter rules for the property it owns or manages.

Carrying it is legal within the limit. The Act protects transporting up to 2.5 ounces, no more than 15 grams of it concentrate (MCL 333.27955), and the sections read for this guide set no container rule for adult-use buyers. Curbside and drive-through orders must be handed over in an opaque bag so the contents are not visible to the public (Mich. Admin. Code R 420.207a). Keeping purchases closed and away from the driver is still a sensible habit, because the passenger-smoking and driver-consumption rules apply as soon as the car is on a public way.

Driving while under the influence of marijuana is operating while intoxicated under the Vehicle Code, which sets numeric limits only for alcohol: 0.08 grams or more per 100 milliliters of blood, and 0.17 for the higher-penalty offense (MCL 257.625(1)), and the Act does not protect it (MCL 333.27954). A separate clause bars driving with any amount of a schedule 1 substance in the body (MCL 257.625(8)). The Michigan Supreme Court held that clause does not apply to registered medical patients who are not under the influence (People v Koon, 2013), the Court of Appeals applied it to an 18-year-old driver (People v Perry, 2021), and we found no appellate ruling on drivers 21 and older under the adult-use Act.

A first OWI conviction is a misdemeanor punishable by up to 93 days in jail, a fine of $100 to $500, up to 360 hours of community service, or a combination; under the 0.17 alcohol provision the jail maximum rises to 180 days and the fine to $200 to $700 (MCL 257.625). A violation within 7 years of a prior conviction brings a fine of $200 to $1,000 plus 5 days to 1 year in jail, 30 to 90 days of community service, or both.

Not legally. Detroit Metropolitan Airport is run by the Wayne County Airport Authority, and its terminals, curbs and garages are open to the public, so using cannabis there is consuming in a public place, which the Act does not authorize (MCL 333.27954). We found nothing about cannabis rules or disposal on DTW's website as archived on September 25, 2026, so do not count on a disposal box. The same public-place rule applies in every other Michigan airport terminal.

The flight is a federal matter. TSA says its officers do not search for illegal drugs, but if any illegal substance is discovered during screening, TSA will refer it to a law enforcement officer; its medical marijuana page, updated April 27, 2026, lists 'Yes (Special Instructions)' for carry-on and checked bags without spelling those instructions out, and adult-use purchases are not medical marijuana. The FAA calls marijuana a Schedule I controlled substance whose cultivation, storage or distribution is prohibited on federally obligated airport property regardless of state law. Federal simple possession carries up to a year in prison and a minimum $1,000 fine (21 U.S.C. 844).

Ontario is no exception. Canada's border agency says it remains illegal to take cannabis across the Canadian border in either direction, whether used medically or recreationally, and tells travelers who have it to declare it, calling the move a serious offence (CBSA). CBP says marijuana remains illegal under U.S. federal law and that arriving at a port of entry with it may result in seizure, fines or arrest and may affect admissibility. That applies at the Ambassador Bridge, the Detroit-Windsor Tunnel and the Gordie Howe International Bridge in Detroit, and at the Blue Water Bridge in Port Huron (CBP port pages).

Michigan's protection also stops at its land borders, and a trip across a state line is covered by federal law, under which adult-use marijuana remains Schedule I (DEA final rule, April 28, 2026). In Wisconsin, possessing THC is punishable by a fine of up to $1,000, up to 6 months in jail or both for a first conviction, and is a Class I felony for a second (Wis. Stat. 961.41(3g)(e)). Ohio rewrote its adult-use law with S.B. 56, which repealed the original possession section effective March 20, 2026; we could not read the replacement text, or Indiana's code, for this guide.

Not at the national parks. Federal law treats adult-use marijuana as a Schedule I drug whose simple possession is a crime, including in National Park System units, with up to a year in prison and a minimum $1,000 fine for a first offense (21 U.S.C. 844; 36 CFR 2.35), and the Park Service says marijuana remains illegal on federal lands including Isle Royale National Park. Michigan's Park Service units include Sleeping Bear Dunes National Lakeshore, Pictured Rocks National Lakeshore, Isle Royale National Park and River Raisin National Battlefield Park in Monroe. Pictured Rocks' Superintendent's Compendium adds park rules but does not mention marijuana, so Title 36 governs.

The 2026 federal rescheduling does not change this for visitors. A DEA final rule effective April 28, 2026 placed FDA-approved marijuana products, and marijuana subject to a state-issued license to manufacture, distribute or dispense it for medical purposes, in Schedule III; marijuana outside those categories stays in Schedule I, and Michigan adult-use purchases fall outside them. DEA's separate rescheduling hearing ran from June 29 to July 15, 2026, and the Chief Administrative Law Judge stayed that case on September 29, 2026, so no final rescheduling rule exists.

State land is not federal, but it is not a free zone either. Mackinac Island State Park covers more than 80 percent of the island and contains Fort Mackinac; it is governed by the Mackinac Island State Park Commission, and state parks are open to the public, where the Act does not authorize consumption (MCL 333.27954). Treasury's FY2025 distribution list showed no licensed retail store in the City of Mackinac Island as of September 30, 2025; Mackinac County's one license was in Newton Township. We found no Department of Natural Resources rule on cannabis at state park campsites, so treat public areas as off-limits.

Tribal land follows tribal and federal law. The Act defines Indian lands as land within a reservation or held in trust by the United States for a tribe, and recognizes tribal marijuana businesses wholly owned by a qualifying tribe, its enrolled members or both, that has agreements with the CRA and Treasury and charges its own tax at a rate at least equal to the state's 10 percent excise (MCL 333.27953). Treasury's FY2025 list counted 8 licensed retail stores or microbusinesses on the Indian lands of 4 tribes as of September 30, 2025: the Grand Traverse Band of Ottawa and Chippewa Indians, the Hannahville Indian Community, the Little Traverse Bay Bands of Odawa Indians and the Sault Ste. Marie Tribe of Chippewa Indians.

Yes, to a home address, from a licensed store approved for delivery. A licensed sales location may deliver once the CRA approves its delivery procedures, and an adult-use store may deliver only to an individual 21 or older at a residential address or at the address of a designated consumption establishment provided when the order was placed (Mich. Admin. Code R 420.207). The CRA counted 334 adult-use retailers approved for home delivery as of February 28, 2026, out of 835 active retailer licenses (CRA Monthly Report, February 2026).

The rules leave no room for third-party couriers. Every delivery driver must be an employee of the store that took the order and must carry the order record and the store's license information, and the store must confirm that the customer presented a valid driver's license or government-issued photo ID showing they are 21 or older at the time of delivery (R 420.207). A delivery may not exceed the single-transaction limit for adults, 2.5 ounces with no more than 15 grams of concentrate (R 420.207, R 420.506), and drivers may carry no more than $5,000 of product at a time.

Hotels are not on the list. The rule names only residential addresses and designated consumption establishments and does not define a residential address or mention hotels, so do not expect a licensed store to deliver to a hotel room, and check that any delivery service is itself a licensed store (R 420.207). Delivery can, however, reach towns that ban stores: the CRA says delivery may occur in municipalities that have opted out, because a municipality may not restrict the transportation of marijuana through its borders (CRA FAQ; MCL 333.27956).

Ordering ahead is the visitor-friendly option. Stores may take online or telephone orders and payment for pickup at the store, and may offer curbside or drive-through service unless a local ordinance prohibits it, with the same ID check and purchase limits as an in-store sale (R 420.207a). Contactless pickups must happen during normal business hours, and the product must be handed over in an opaque bag. These options were added by rules effective March 7, 2022, and pickup avoids any question about whether your lodging counts as a residential address.

Yes, for adults 21 and older at their own residence: up to 12 plants, with no more than 12 possessed, cultivated or processed on the premises at once, and the household may keep the marijuana those plants produce in addition to the 10-ounce home limit (MCL 333.27955). The cap is per residence, not per adult. The protection covers cultivation within the person's residence, so a hotel room or short rental is not a grow site, and an owner may prohibit cultivation on property they own, occupy or manage (MCL 333.27954).

The plants must be hidden and locked. The Act does not authorize growing plants that are visible from a public place without binoculars, aircraft or other optical aids, or outside an enclosed area equipped with locks or other functioning security devices that restrict access (MCL 333.27954). Extracting resin with butane or another substance with a flashpoint below 100 degrees Fahrenheit is also outside the Act in any public place, in a vehicle or within the curtilage of a home. Any harvest above 2.5 ounces kept at home must be locked up.

Landlords and owners may say no to growing. The Act lets a person prohibit or regulate cultivation on property the person owns, occupies or manages, while the lease protection covers only possessing and consuming by means other than smoking, not cultivation (MCL 333.27954). Starting plants can be bought legally: a licensed store may sell up to 3 immature plants per transaction (Mich. Admin. Code R 420.506). Seeds count as marijuana under the Act's definition, so they fall within the same possession rules (MCL 333.27953).

Going over the plant count brings graded penalties. Growing more than 12 but not more than 24 plants is a civil infraction with a fine of up to $500 for a first violation and $1,000 for a second, plus forfeiture, and a third violation is a misdemeanor with a fine of up to $2,000; more than 24 plants is a misdemeanor, with no jail unless the violation was habitual, willful and for a commercial purpose or involved violence (MCL 333.27965). Registered medical patients follow the separate plant rules of the Medical Marihuana Act (MCL 333.26424).

Two taxes appear at the register on an adult-use sale. The Act imposes a 10 percent excise tax on the sales price of marijuana sold to anyone other than a licensed establishment or tribal marijuana business, 'in addition to all other taxes' (MCL 333.27963), and Treasury says retail sales are also subject to the state's 6 percent sales tax (RAB 2023-25). The sales tax base includes the excise, so the 6 percent sales tax is charged on the price plus the 10 percent excise (RAB 2023-25).

The 24 percent wholesale tax is new for 2026. The Comprehensive Road Funding Tax Act, 2025 PA 23, signed October 7, 2025, imposes a 24 percent excise on the wholesale price of adult-use marijuana from January 1, 2026: on the first sale from a grower or processor to a retailer, on product a seed-to-sale retailer such as a microbusiness packages for itself, and on transfers from medical provisioning centers to adult-use retailers (RAB 2026-3; MCL 205.905). The tax is imposed on the wholesaler, not the shopper, and Treasury says the revenue goes to the neighborhood road fund.

Bundling is restricted, and medical sales are treated differently. A product subject to the 10 percent excise may not be bundled in a single transaction with a product or service that is not, unless a Treasury rule allows it (MCL 333.27963). Sales to registered medical patients by a licensed provisioning center, including visiting qualifying patients, are not subject to the 10 percent excise, and an entity holding both licenses must itemize medical sales separately (MCL 333.27963; RAB 2023-25). Tribal marijuana businesses are exempt from the state excise but must charge their own tax at an equal or higher rate (MCL 333.27963, 333.27953).

Marijuana revenue is shared through the Marijuana Regulation Fund. For fiscal year 2025, Treasury distributed $93,773,685.60, paying $54,017.10 to each eligible municipality, county and tribe for every licensed retail store and microbusiness in its jurisdiction, based on 868 licenses as of September 30, 2025; Detroit's 61 brought the city $3,295,043.10 (FY 2025 Adult-Use Marijuana Distributions; LARA). Municipalities may charge marijuana establishments an annual fee of up to $5,000 (MCL 333.27956), but neither the Act nor Treasury's bulletins list a local tax charged to shoppers.

Yes, in a limited way. The Michigan Medical Marihuana Act gives a registry card, or its equivalent, issued under another state's or territory's law to a visiting qualifying patient the same force and effect as a Michigan card (MCL 333.26424(k)). A visiting qualifying patient is someone who is not a Michigan resident or has lived in Michigan for less than 30 days (MCL 333.26423). Card holders are protected for up to 2.5 ounces of usable marijuana and usable marijuana equivalents, and the arrest protection applies only when the patient shows both the card and a photo ID (MCL 333.26424).

Visiting patients can also buy at medical stores. Before selling to a visiting qualifying patient, a licensed provisioning center must verify a valid, unexpired registry card or its equivalent from another state, district, territory, commonwealth or insular possession that allows medical use, a valid driver's license or government-issued photo ID, and that the sale stays within the purchasing limits (Mich. Admin. Code R 420.505). For registered patients those limits are 2.5 ounces per day and 10 ounces per month (R 420.506). The CRA counted 95 active provisioning center licenses on February 28, 2026.

Medical purchases skip the 10 percent excise. Sales under the medical laws are exempt from the adult-use excise (MCL 333.27963), and Treasury notes that 'registered qualifying patient' in the facilities law includes visiting qualifying patients (RAB 2023-25). Adults 21 and older can also shop adult-use, where no card is needed and the possession limit is the same 2.5 ounces. For conversions, 1 ounce of usable marijuana equals 16 ounces of a solid infused product, 7 grams of an infused product in gaseous form or 36 fluid ounces in liquid form (MCL 333.26424).

Michigan's own registry is for residents. The CRA says applicants must submit proof of Michigan residency, such as a Michigan driver's license, a Michigan personal identification card or a valid Michigan voter registration (CRA MMMP FAQ). The application fee is $40, and a patient card is valid for two years. The registry counted 57,313 patients and 3,531 caregivers as of February 28, 2026, with 0 patients listed as out of state (CRA Monthly Report, February 2026). The medical act took effect December 4, 2008 (MCL 333.26423).

Most visitor mistakes under the Act are civil. Using cannabis in public while holding no more than the legal amount is a civil infraction with a fine of up to $100 and forfeiture (MCL 333.27965). Holding more than the limit but not more than twice it, meaning more than 2.5 and up to 5 ounces away from home or more than 10 and up to 20 ounces at home, is a civil infraction with a fine of up to $500 for a first violation and up to $1,000 for a second, and a third is a misdemeanor with a fine of up to $2,000.

Above twice the limit, the Act still sets the penalty. Possessing, growing or giving away more than twice the allowed amount is a misdemeanor, but the person may not be imprisoned unless the violation was habitual, willful and for a commercial purpose, or involved violence (MCL 333.27965). Section 15 says a person it covers may be punished only as it provides, unless they consent to another disposition. Selling is a different matter, because the Act's gifting protection covers only transfers without remuneration that are not advertised (MCL 333.27955).

Conduct the Act excludes is handled by other laws. Driving under the influence is operating while intoxicated, a first offense punishable by up to 93 days in jail and a fine of $100 to $500 (MCL 257.625), and the $100 civil cap does not apply to consuming while driving, smoking in a vehicle on a public way, school grounds or transfers to people under 21 (MCL 333.27965). Under-21 possession of up to 2.5 ounces is a civil infraction with fines of up to $100 for a first violation and $500 for a second.

Federal and foreign penalties are harsher. On federal land and at federal checkpoints, simple possession carries up to a year in prison and a minimum $1,000 fine for a first offense (21 U.S.C. 844), and the Park Service applies federal law in national parks (36 CFR 2.35). At the Ontario crossings, CBP warns of seizure, fines, arrest and effects on admissibility, and Canada's border agency calls moving cannabis across the border a serious offence. In Wisconsin a first THC possession conviction can bring a fine of up to $1,000 and up to 6 months in jail (Wis. Stat. 961.41(3g)(e)).

Check the business against the CRA's license search. The agency's Verify a License page links to its Accela search for adult-use establishments, medical facilities and tribal marijuana businesses, with license types such as Marihuana Retailer, Marihuana Microbusiness, Class A Marihuana Microbusiness, Designated Consumption Establishment and Tribal Marihuana Retailer (CRA). The CRA's monthly report counted 835 active retailer licenses, 6 microbusiness licenses and 9 class A microbusiness licenses as of February 28, 2026, out of 2,159 active adult-use licenses of all types (CRA Monthly Report, February 2026).

Licensed stores follow visible rules. Before each sale the store must check your photo ID and age, confirm the product has been tested, labeled and packaged as the rules require, confirm it is not recalled, on hold or past its expiration date, and record the sale in the statewide monitoring system (Mich. Admin. Code R 420.505). No one may consume on the premises of an ordinary store (R 420.203), and pickup orders leave in an opaque bag (R 420.207a). A seller willing to go past 2.5 ounces in one transaction is breaking the purchase limit (R 420.506).

Michigan's definition of marijuana is broad. Under the Act's current definitions, last amended in 2023, THC includes tetrahydrocannabinols whether naturally or artificially derived and their isomers, and a product with more than 0.3 percent THC in the form sold to consumers, or a consumable product with more total THC than the CRA's limit, counts as marijuana rather than hemp (MCL 333.27953). An intoxicating 'hemp' product sold outside a licensed store may therefore be marijuana sold without a license, and Treasury applies the 10 percent excise to illegal sellers too (RAB 2023-25). The CRA also publishes disciplinary actions against licensees.

Store counts vary by city because each municipality decides. A city, village or township may completely prohibit or cap marijuana establishments, and residents may petition to put a ban or cap on the ballot (MCL 333.27956). Treasury's FY2025 list counts 61 licensed retail stores and microbusinesses in Detroit, 27 in Grand Rapids, 26 in Lansing, 23 in Ann Arbor and 11 in Traverse City as of September 30, 2025, and 860 across 234 cities, villages and townships. Detroit's Office of Cannabis Affairs also publishes a map of the city's licensed retailers.