Cannabis law in Iowa (2026)
Last reviewed: 9 October 2026
In short: Possessing marijuana is a criminal offence in Iowa; a first offence carries up to six months in jail or a fine of up to 1,000 dollars. Growing and selling are prohibited. A state medical cannabis programme exists for listed conditions, with a cap of 4.5 g of total THC per 90 days unless a practitioner certifies otherwise.
| Rule | What applies |
|---|---|
| Possession for personal usePersonal use by an adult | Criminal offence [1] |
| Growing at homePersonal use by an adult | Prohibited [1] |
| Sale to consumersPersonal use by an adult | Prohibited [1] |
| Medical cannabisPersonal use by an adult | Restricted programme only [2] |
| Driving after cannabis usePersonal use by an adult | Driving while under the influence of a drug is an offence, and so is driving with any amount of a controlled substance in the blood or urine (zero tolerance). Taking a prescribed substance as directed is a defence to the zero-tolerance charge. [3] |
Notes
- Applies to marijuana as a controlled substance; repeat offences are aggravated misdemeanours. Medical use under chapter 124E is the exception.
- Growing falls under manufacture (production, propagation) of a controlled substance, which is a criminal offence.
- Registered patients with a listed debilitating condition (for example cancer, seizures, chronic pain, PTSD) may buy medical cannabis products from licensed dispensaries; the cap is 4.5 g of total THC per 90 days, higher only with practitioner certification (terminal illness or insufficiency).
Sources
- Iowa Legislature: Iowa Code section 124.401 (Prohibited acts - manufacture, delivery, possession) (consulted 9 October 2026) · all sources
- Iowa Legislature: Iowa Code section 124E.9 (Medical cannabidiol dispensaries) (consulted 9 October 2026) · all sources
- Iowa Legislature: Iowa Code 321J.2 Operating while under the influence of alcohol or a drug (consulted 10 October 2026) · all sources
National rules that also apply
These rules are set at national level in the United States and apply here too, alongside the rules above. All national rules for the United States
| Possession for personal use | Criminal offence (source: U.S. Government Publishing Office (govinfo)) |
|---|---|
| Growing at home | Prohibited (source: U.S. Government Publishing Office (govinfo)) |
| Sale to consumers | Prohibited (source: U.S. Government Publishing Office (govinfo)) |
Iowa and neighbouring states
| State | Possession for personal use | Growing at home | Sale to consumers | Use or carrying in public places | Medical cannabis | Visitors |
|---|---|---|---|---|---|---|
| Iowa | Criminal offence | No | No | — | Restricted medical programme | — |
| Illinois | Legal for 21+ within limits | No (medical patients only) | Licensed dispensaries | Banned in public places | Medical programme with dispensaries | Yes, but half the resident limit |
| Minnesota | Legal for adults 21+, within limits | Yes: 8 plants, max 4 mature | Licensed sellers only | Private property or licensed venues | Medical registry programme | Source silent on visitors |
| Missouri | Legal for adults 21+, within limits | Yes, with a registration card | Licensed dispensaries | Banned outside licensed areas | Medical programme (ID cards) | Source silent on visitors |
| Nebraska | 1 oz or less: infraction, $300 fine (first time) | ⚠ Not yet verified | ⚠ Not yet verified | ⚠ Not yet verified | Legal for qualified patients; programme not yet running | ⚠ Not yet verified |
| South Dakota | Criminal offence (misdemeanour up to 2 oz) | ⚠ Not yet verified | Prohibited (medical dispensaries only) | — | Registered cardholders | Non-resident medical cardholders protected |
| Wisconsin | Criminal offence (misdemeanour, then felony) | No (felony) | No (felony) | — | ⚠ Not yet verified | — |
More rules in Iowa
- Car speed limitsBuilt-up areas: 20 mph business, 25 mph residential · Outside built-up areas (single carriageway): 55 mph
- Minimum age for a car driving licenceMinimum age for a car licence: 16 (intermediate licence) · Earliest age to drive a car supervised: 14 (instruction permit)
- E-bikes and speed pedelecsLegal class: Class 1-3, a bicycle · Minimum age: Class 3: 16
- FireworksConsumers may buy and use category F2 fireworks: Yes (consumer fireworks) · Minimum age to buy: 18
- Knives and pepper sprayFolding pocket knives: Only an offence if used in a crime · Locking or one-handed knives: Ballistic knife: class D felony; switchblade listed
- Statutory minimum wageNational statutory minimum wage: Yes · Current adult minimum wage (gross): $7.25 per hour (or federal if higher)
- Using a mobile phone while drivingHolding a phone while driving banned: Banned · Hands-free use: Hands-free allowed
- Seat belts and child seatsSeat belt compulsory in front seats: Yes · Seat belt compulsory in rear seats: Under 18 only
- Tobacco and nicotine age limitsMinimum age to buy tobacco: 21 · Minimum age to buy e-cigarettes: 21
- Drinking age and alcohol salesMinimum age to buy beer and wine: 21 · Minimum age to buy spirits: 21
- Drink-driving limitsBlood alcohol limit for ordinary drivers: 0.08% · Lower limit for novice or young drivers: 0.02% (under 21)
Related pages
General information, not legal advice. Rules change: check the official source before you fly or ride.