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Montana Cannabis Legal Status (2026)

Permitted: Recreational cannabis is legal in Montana for adults 21 and older, and a medical program also operates (Initiative 190, 2020; sales began January 2022).

PermittedVerified Jul 13, 2026

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Official source: revenue.mt.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Cannabis Legal Status in states bordering Montana

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

IdahoRestricted
Cannabis is fully illegal in Idaho for both medical and recreational use. Narrow exceptions exist only for FDA-approved cannabis-derived drug products: CBD formulations with no more than 0.1% residual THC (Epidiolex), nabiximols, and FDA-approved dronabinol (Marinol and Syndros). Any CBD product sold at retail in Idaho must contain 0.0% THC. Possession of 3 ounces or less carries a mandatory minimum $300 fine for anyone 18 or older, on top of the misdemeanor penalty.
Verified Jul 28, 2026 · Source: legislature.idaho.gov · Full Idaho rule →
North DakotaConditional
North Dakota has allowed medical cannabis only since 2016, and recreational use is illegal. Adult-use legalization was rejected by voters in November 2024.
Verified Jul 13, 2026 · Source: hhs.nd.gov · Full North Dakota rule →
South DakotaConditional
South Dakota allows medical cannabis only (Initiated Measure 26, 2020). There is no recreational adult-use program, and recreational possession and use remain illegal. Qualified patients need a registry ID card.
Verified Aug 2, 2026 · Source: doh.sd.gov · Full South Dakota rule →
WyomingRestricted
Cannabis is illegal in Wyoming, which has no medical or recreational program — both medical and recreational use are fully illegal. Only hemp-derived CBD with 0.3% THC or less is lawful.
Verified Aug 2, 2026 · Source: wyoleg.gov · Full Wyoming rule →

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