Montana Code Annotated 16-12-106 is the personal-use section. It applies to a person who is 21 or older or who is a registered cardholder.
This is a plain-language summary, not legal advice. Laws and local rules change. Read the official sources at the bottom of this page.
Cannabis-friendly lawyers in Montana
Listed October 2026
These firms and attorneys are listed in the NORML lawyer directory for Montana. Cities and phone numbers below are taken from those listings.
Criminal defense and individual help
Craig Kevin Shannon NORML directory
Missoula
Listed in the NORML lawyer directory for Montana as a criminal defense and marijuana lawyer in Missoula.
Source: NORML listing
Penelope S Strong NORML directory
Billings
Listed in the NORML lawyer directory for Montana as a criminal defense and marijuana lawyer in Billings.
Source: NORML listing
Criminal defense
These lawyers defend cannabis and marijuana charges in Montana.
A&M Law
Missoula
A&M Law's Missoula drug-defense page says that exceeding Montana's marijuana limits, distributing outside the regulated market, or possession by a minor can still result in criminal charges.
Starting a cannabis business
These lawyers help with licensing, forming a company, and compliance for a cannabis business in Montana.
Ironleaf Law Firm
Helena
Ironleaf Law Firm in Helena says it helps Montana cultivators, manufacturers, dispensaries, and investors with new licenses, compliance, and entity formation.
Not a referral. This list is not an endorsement, and there is no paid placement. We have not verified bar standing or discipline history. Before you hire anyone, confirm them through the State Bar of Montana.
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Possession, plants, and public use
- A person 21 or older, or a registered cardholder, may possess 1 ounce or less of usable marijuana, not more than 8 grams in a concentrated form, and not more than 800 milligrams of THC in solid edible products.
- The same amounts may be transferred without consideration.
- At a private residence, a person may have up to two mature plants and two seedlings. A registered cardholder may have four mature plants and four seedlings.
- Plants, and any marijuana over 1 ounce, must be kept in a locked space and not be visible by normal unaided vision from a public place.
- Not more than twice the permitted number of plants may be at one residence. The grower must own the residence or have written permission. No part of a residence used for personal cultivation may be shared, rented, or leased to a marijuana business.
- Plants that are visible, or marijuana stored unlocked, can bring a civil fine not exceeding $250 and forfeiture.
- Smoking marijuana in a public place other than an area licensed by the department can bring a civil fine not exceeding $50.
- A person under 21 who is not a cardholder is punished for possession, use, or delivery without consideration under section 45-5-639.