Idaho Marijuana Laws (2026): A Beginner’s Guide
Quick answer: Marijuana is fully illegal in Idaho, for both recreational and medical use. There is no legal possession limit. Since January 1, 2026, even 3 ounces or less carries a mandatory $300 minimum fine plus possible jail. Home growing is a crime, and Idaho doesn’t allow any THC in hemp products.
Last verified: October 20, 2026, against Idaho Code § 37-2732. Laws change, so check the official site before you travel or buy.
| Recreational | No. Illegal. |
|---|---|
| Medical | No. A 2026 medical initiative didn’t collect enough valid signatures. |
| Minimum age | Not applicable. Illegal at any age. |
| Possession limit | None. 3 oz or less is a misdemeanor; more than 3 oz is a felony. |
| Home grow | No. Cultivation is a felony. |
| Public use | No. Use or intoxication in public is its own misdemeanor. |
| Driving limit/DUI rule | Impairment-based DUI; no set THC number |
| Medical card for visitors | Not recognized |
Is weed legal in Idaho?
Err… No. Not even a little. Idaho is one of the few states with no medical program, no decriminalization law and no adult-use law. Its neighbors went the other way: Washington, Oregon, Montana and Nevada all allow adults 21 and older to buy cannabis. Idaho went further in the opposite direction. A 2025 law (House Bill 7) added a mandatory minimum $300 fine for simple possession, starting January 1, 2026.
Idaho also has some of the highest cannabis arrest rates in the country. If you are visiting from a legal state, leave your stash at home.
Federal law agrees with Idaho on recreational use, since marijuana is still Schedule I. In April 2026, federal regulators moved state-licensed medical marijuana to Schedule III. But Idaho has no state medical license, so that change does nothing for Idahoans.
What’s on the November 3, 2026 ballot?
House Joint Resolution 4 (HJR 4) is on the November 3, 2026 ballot. It’s a proposed amendment to the Idaho Constitution. If approved, only the Idaho Legislature would have the power to legalize marijuana, narcotics or other psychoactive substances. That covers medical and recreational use, growing, selling and possessing. Citizens could no longer use the ballot initiative process to do it. The amendment needs a simple majority of voters to pass. If it fails, the constitution stays as it is, and voters keep the option of using initiatives on these issues.
Separately, the Natural Medicine Alliance of Idaho tried to put a medical cannabis initiative on the 2026 ballot. After state review, it fell short of the required number of valid signatures, so it won’t appear. For the official ballot wording, check VoteIdaho.gov.
Can you get a medical card in Idaho?
No. Idaho has no medical marijuana program and does not recognize medical cards from other states. A card from Washington or Oregon won’t protect you in Idaho. The only cannabis-based medicine you can legally get is an FDA-approved prescription drug, such as Epidiolex for certain seizure disorders.
Shopping for CBD? Be careful. Idaho does not allow any THC in hemp products, so many “full-spectrum” CBD products sold legally in other states are illegal here. The federal hemp law passed in November 2025 tightens things nationwide too. Intoxicating hemp products such as delta-8 and THCA flower lose legal status, with the main provisions taking effect December 11, 2026.
Where can you buy?
Nowhere in Idaho. There are no dispensaries, medical or recreational. If you want to experience legal cannabis, you’ll have to visit a legal state such as Washington or Oregon, and use it there.
How much can you possess?
Legally, zero. Here’s how Idaho Code § 37-2732 treats possession:
- 3 ounces or less: misdemeanor, up to 1 year in jail and/or up to $1,000, plus a mandatory minimum $300 fine for anyone 18 or older
- More than 3 ounces: felony, up to 5 years in prison and/or a fine of up to $10,000
- 1 pound or more (or 25+ plants): treated as trafficking, with mandatory minimum prison sentences
Concentrates and edibles are treated as marijuana too. Paraphernalia (pipes, bongs, rolling papers used for cannabis) is a separate misdemeanor.
Can you grow your own?
No. Growing any number of plants is a felony in Idaho. Larger grows count as trafficking and carry mandatory minimum sentences. Even being present at a place where cannabis is grown or stored can be a misdemeanor.
Where can you smoke?
Nowhere legally. Using marijuana or being under its influence in public is a separate misdemeanor in Idaho, with up to 6 months in jail and a $1,000 fine. Using at home doesn’t make possession legal either.
Can you drive after using?
No. Idaho’s DUI law covers driving under the influence of any drug, cannabis included. There is no set THC number. If an officer believes you are impaired, you can be arrested, and you will almost certainly face a possession charge too. Police along the Washington and Oregon borders are well aware that people drive back with purchases.
Can you take it out of state?
Bringing cannabis into Idaho from Washington, Oregon, Nevada or Montana is illegal under Idaho law. Moving cannabis across state lines is also a federal crime, so it doesn’t matter that you bought it legally next door. The receipt from a Spokane dispensary is not a defense. It’s evidence.
Can your employer fire you?
Yes. Idaho offers no protection for cannabis use, on or off the job, and that includes legal use in another state. Employers can test, refuse to hire and fire for a positive result.
What are the penalties?
- Simple possession (3 oz or less): misdemeanor, $300 to $1,000 in fines, up to 1 year in jail
- Over 3 oz: felony, up to 5 years and $10,000
- Selling or growing: felony; mandatory minimums at trafficking amounts
- Public use or intoxication: misdemeanor, up to 6 months and $1,000
- Paraphernalia: misdemeanor, up to 1 year and $1,000
See how Idaho compares with its neighbors in our state marijuana law hub.
Idaho marijuana law FAQ
Is medical marijuana legal in Idaho?
No. Idaho has no medical marijuana program and does not accept medical cards from other states. A 2026 citizen initiative to create a medical program did not qualify for the ballot. Only FDA-approved cannabis-based prescription drugs are legal.
What is HJR 4 in Idaho?
HJR 4 is a proposed amendment to the Idaho Constitution on the November 3, 2026 ballot. It would give the Idaho Legislature the sole power to legalize marijuana, narcotics and other psychoactive substances, which would take that option away from voter initiatives. It needs a simple majority to pass.
What happens if you get caught with weed in Idaho?
Possession of 3 ounces or less is a misdemeanor. It carries a mandatory minimum $300 fine for adults (since January 1, 2026), up to a $1,000 fine and up to a year in jail. More than 3 ounces is a felony punishable by up to 5 years in prison and a $10,000 fine.
Is CBD legal in Idaho?
Only if it contains no THC at all. Idaho does not allow any THC in hemp products, so many full-spectrum CBD products sold in other states are illegal in Idaho. Delta-8 and THCA flower are also off-limits. Federal hemp restrictions take effect December 11, 2026.
Can I bring weed from Washington or Oregon into Idaho?
No. Bringing cannabis into Idaho is illegal under state law, even if you bought it legally across the border. Crossing state lines with cannabis is also a federal crime. Use it where you buy it, or don’t buy it.