Is Marijuana Legal in Idaho? A 2026 Guide

If you are searching this from Cache Valley, here is the short version: marijuana is illegal in Idaho, and it has been the whole time. The state has never run a medical program, has never legalized recreational use, and lists both marijuana and THC as Schedule I controlled substances. Idaho is one of the strictest states in the country on this, and nothing about the basic answer is in doubt.

What is worth understanding in 2026 is the recent motion around that ban, because a lot of it made the news and none of it changed the law. Two citizen initiatives tried to loosen the rules this year and both fell short. At the same time, lawmakers put a constitutional amendment on the November ballot that would make the ban harder to undo. And there is a separate trap that catches people who assume Idaho follows the federal hemp rules, because it does not.

Is marijuana legal in Idaho right now?

No. Idaho’s controlled substances schedules, in Idaho Code 37-2705, list “marihuana (marijuana)” and tetrahydrocannabinols as Schedule I. Schedule I is the most restrictive tier, reserved for substances the state treats as having no accepted medical use, and marijuana sits squarely on it. The only THC-related carve-outs in the statute are the permitted amount found in industrial hemp and two specific drug products the FDA has approved. Everything else is prohibited to buy, sell, and possess statewide.

There is no recreational allowance and no medical exception. Unlike most of the western states around it, Idaho has never passed a law letting patients or adults use cannabis, so there is no card, no dispensary, and no legal quantity.

What are the penalties for having it?

Possession is a crime, and the line that matters is three ounces. Under Idaho Code 37-2732, possessing three ounces of marijuana or less is a misdemeanor that carries a fine of at least $300. Possessing more than three ounces is a felony, punishable by up to five years in prison, a fine of up to $10,000, or both. Those are the possession thresholds; manufacturing, delivery, and trafficking are handled separately and more harshly.

This is general information rather than legal advice, and anyone facing an actual charge should talk to an Idaho attorney. The point for a shopper is simpler: there is no small amount that is legal to carry in Idaho.

Idaho has no medical program, and 2026 did not change that

Idaho remains one of the few states with no medical cannabis program of any kind. Two efforts to change that reached voters’ attention in 2026, and both failed.

The Idaho Medical Cannabis Act and a separate Decriminalize Cannabis Now initiative each tried to qualify for the November 2026 ballot through signature drives. The Idaho Secretary of State lists both under “Did Not Qualify”, having fallen short on the required number of valid signatures and the required spread across legislative districts. So neither one reaches voters, and current law stands.

Moving the other direction, the Legislature referred a constitutional amendment to that same ballot. House Joint Resolution 4, which passed both chambers in 2025, would amend the Idaho Constitution so that only the Legislature can legalize marijuana, narcotics, or other psychoactive substances, cutting off the citizen-initiative route that the 2026 campaigns tried to use. Whatever voters decide on it, the near-term momentum in Idaho is toward keeping the ban in place, not loosening it.

What about across the line in Utah?

For Cache Valley shoppers who cross the state line, Utah is not a workaround. Utah runs a medical-only cannabis program through the state, with no recreational use allowed. So on both sides of the border here, buying marijuana for recreational use is illegal, and Idaho has no medical option at all. This is the opposite of the kratom situation, where Idaho is the more permissive side of the line.

The hemp and CBD catch: zero THC

This is where honest shoppers still get tripped up, because Idaho does not follow the federal hemp rule the way most states do.

Idaho legalized industrial hemp in 2021, and Idaho Code 22-1703 defines it the federal way, as cannabis with no more than 0.3% delta-9 THC on a dry weight basis. But that 0.3% describes the raw plant a licensed grower may cultivate, not what may sit on a store shelf. For retail, the Idaho Office of Drug Policy is explicit: a CBD product is legal in Idaho only if it is processed from industrial hemp rather than marijuana and contains zero THC. Any detectable THC makes it illegal here.

Two things follow from that. First, the “full-spectrum” and 0.3%-THC hemp products marketed freely in other states are not legal to sell in Idaho. Second, the intoxicating hemp variants like delta-8 THC are controlled substances here, because they are tetrahydrocannabinols and Idaho’s zero-THC retail line leaves them no room. A product being labeled “hemp-derived” does not make it legal in Idaho if it contains THC.

What we actually carry

We do not sell marijuana or any THC product at Cub River, because none of it is legal in Idaho. What is legal, and what is on our shelves, is a different set of things sold to adults 21 and older: kratom, nicotine pouches, and vapes.

If kratom is what brought you here, it is legal in Idaho, and we wrote that up in detail in Is Kratom Legal in Idaho? and a local buyer’s guide, Where to Buy Kratom in Cache Valley. Our Franklin location is about 25 minutes up US-91 from Logan.

Sources and methodology

Every legal claim here was checked against a primary source on July 16, 2026.

• Idaho scheduling: Idaho Code 37-2705 lists marijuana and tetrahydrocannabinols in Schedule I, with narrow exceptions for the permitted amount in industrial hemp and specific FDA-approved drug products.
• Possession penalties: Idaho Code 37-2732 sets the three-ounce misdemeanor and felony thresholds.
• 2026 ballot measures: the Idaho Secretary of State’s initiatives and amendments page lists the Idaho Medical Cannabis Act and the Decriminalize Cannabis Now initiative as not qualified, and lists HJR 4 as a referred constitutional amendment. The amendment text is in HJR 4 (2025).
• Hemp definition: Idaho Code 22-1703 defines industrial hemp at 0.3% delta-9 THC or less.
• Retail CBD and THC: the Idaho Office of Drug Policy CBD page states a retail CBD product must be hemp-derived and contain zero THC.
• Utah: the Utah medical cannabis program confirms Utah’s program is medical only.

Laws change, and this is general information rather than legal advice. If you are making a decision that hinges on a specific charge or product, confirm the current rule with the state or an attorney directly.