Cannabis is legal for adult use in Montana but remains illegal for recreational purposes in Wyoming; both states, however, are poised to see significant policy shifts in 2026 as Montana prepares to tighten possession limits and Wyoming moves toward a limited medical program.¹
Montana’s Current Landscape
Montana voters approved Initiative 190 in November 2020, legalizing adult possession of up to one ounce of flower and up to 10 grams of concentrate. Retail sales began in January 2022 under a licensing framework that mandates state‑run testing labs. As of 2025, licensed dispensaries number over 250, generating roughly $250 million in annual sales.^2
Wyoming’s Current Landscape
Wyoming continues to classify cannabis as a Schedule I substance. Possession of any amount can result in misdemeanor charges, though limited CBD oil with less than 0.3 percent THC is permitted for specific medical conditions under a 2021 amendment. The state has rejected multiple ballot measures, most recently in 2024, where 56 percent voted against legalization.^3
What Changed in 2026?
Montana’s 2026 Adjustments
Effective July 1 2026, Montana will lower the permissible possession of raw flower to 0.5 ounce for adults, aiming to curb cross‑border trafficking to neighboring states. The amendment also expands the list of qualifying medical conditions, adding chronic migraine and post‑traumatic stress disorder. The change follows a 2025 legislative report linking higher possession limits to increased youth exposure.^4
Wyoming’s 2026 Reform
In a surprising turn, Wyoming’s legislature passed House Bill 18 in March 2026, establishing a limited medical cannabis program for patients with intractable epilepsy, multiple sclerosis, and end‑stage cancer. The bill permits licensed physicians to recommend low‑THC extracts, with cultivation limited to two licensed growers per county. While recreational legalization remains off the table, the medical expansion marks the first statutory acknowledgment of cannabis beyond CBD in the state.^5
Frequently Asked Questions
What is the legal age for cannabis purchase in Montana?
Adults 21 years or older may purchase cannabis from licensed dispensaries. Age verification is mandatory at the point of sale, and retail locations must display proof of compliance with state regulations.
Can a Wyoming resident obtain medical cannabis in 2026?
Yes, patients meeting the qualifying conditions may obtain low‑THC extracts through the newly authorized medical program, provided they have a physician’s recommendation and register with the state health department.
Are there limits on how much cannabis a Montana adult can grow at home?
Montana permits personal cultivation of up to four mature plants and four seedlings per adult resident, with a maximum of twelve plants per household.
How does the 2026 possession limit in Montana compare to neighboring states?
The 0.5‑ounce limit aligns more closely with Idaho, which prohibits recreational possession entirely, and contrasts with Colorado’s one‑ounce allowance. This adjustment aims to reduce illicit transport across state lines.
Will Wyoming ever consider full legalization?
While the 2026 medical bill signals a shift in legislative attitude, polls from 2025 show only 38 percent of Wyoming voters support full legalization. Future ballot initiatives will likely depend on evolving public opinion and neighboring state policy trends.