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Recreational & medical legal

Cannabis Laws in Montana

Is weed legal in Montana? Yes — recreational and medical cannabis are both legal here for adults 21+.

Adults 21 and older may possess up to 1 oz of marijuana or its equivalent. Adult-use sales began in January 2022, with local restrictions on where stores may operate. Montana residents may grow two mature plants and two seedlings per adult in a secured private space out of public view.

Federally, cannabis is still a controlled substance nationwide — but that status is in flux. See where rescheduling stands →

StatusRecreational & medical legal
Recreational since2020
Adult-use retailOpen
Possession and purchase limitsAdults: up to 1 oz of usable cannabis, with no more than 8 g concentrated cannabis or 800 mg THC in solid edible products; lawful home-grown harvest has separate storage rules.
Home growingAdult Montana residents: 2 mature plants and 2 seedlings per person; maximum 4 mature plants and 4 seedlings per private residence. Medical-cardholder limits differ.
Adult-use minimum age21+

Regulated by Montana Department of Revenue, Cannabis Control Division.

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Reviewed 2026-11-08. This is general information for adults 21+, not legal advice — cannabis laws change frequently. Confirm current rules with Montana Department of Revenue, Cannabis Control Division before acting.