Quick answer
Marijuana in Montana: Recreational + medical legal. Montana voters approved adult-use marijuana in 2020, with retail sales beginning in 2022. Adults 21 and older may possess up to one ounce and grow up to four plants (two mature) at home. Employers may still enforce drug-free workplace policies and test employees.
Key facts
- Recreational marijuana legal since 2020.
- Medical marijuana legal since 2004.
- Adults may typically possess up to 1 oz.
- Home cultivation permitted.
Workplace testing
Montana allows workplace drug testing and employers may act on positive results. State legalization does not override employer drug policies, and a medical card does not shield an employee from testing.
Montana does not broadly protect off-duty cannabis use in employment; employers may still enforce drug-free workplace policies and test under state law.
Detection & panels
See how long substances stay detectable in our detection chart, compare standard panels, or use the test finder. Local testing locations in Montana are listed on the Montana drug testing page.
Frequently asked questions
Is marijuana legal in Montana?
Montana status: Recreational + medical legal. Montana voters approved adult-use marijuana in 2020, with retail sales beginning in 2022. Adults 21 and older may possess up to one ounce and grow up to four plants (two mature) at home. Employers may still enforce drug-free workplace policies and test employees.
Can an employer in Montana drug test me?
Montana allows workplace drug testing and employers may act on positive results. State legalization does not override employer drug policies, and a medical card does not shield an employee from testing.
Does a medical card protect me from testing in Montana?
Montana does not broadly protect off-duty cannabis use in employment; employers may still enforce drug-free workplace policies and test under state law.