Cannabis law in Missouri (2026)
Last reviewed: 9 October 2026
In short: Adults aged 21 or over may possess up to 3 ounces of dried marijuana, and may grow plants at home with a state registration card. Sale is through licensed dispensaries, and consumption in public places is not allowed outside licensed areas.
| Rule | What applies |
|---|---|
| Possession for personal usePersonal use by an adult | Permitted within limits [1] |
| Quantity limitsPersonal use by an adult | Up to 3 ounces of dried, unprocessed marijuana or its equivalent. [1] |
| Growing at homePersonal use by an adult | Permitted within limits [1] |
| Sale to consumersPersonal use by an adult | Licensed retail stores for adults [1] |
| Use or carrying in public placesPersonal use by an adult | Prohibited [1] |
| Medical cannabisPersonal use by an adult | Legal for medical use [2] |
| VisitorsPersonal use by an adult | Not addressed in the source [1] |
| Minimum agePersonal use by an adult | 21 years [1] |
| Purchase limit in licensed shopsPersonal use by an adult | A consumer may buy up to 3 ounces of dried, unprocessed marijuana, or its equivalent, in a single transaction. [2] |
| Driving after cannabis usePersonal use by an adult | Driving while under the influence of marijuana remains an offence. For drivers aged 21 or over, a conviction requires evidence of actual impairment, not just the presence of THC or its metabolites. [1] |
Notes
- The amendment also sets a 3-ounce limit per purchase transaction.
- Growing requires a personal cultivation registration card from the department, with plants and any produce above 3 ounces kept at one private residence in a locked space not visible from a public place.
- Smoking marijuana where tobacco smoking is prohibited is also listed as not authorised.
- The department continues to issue patient ID cards under the medical programme (Article XIV, Section 1). The patient rules themselves were not read.
- Neither page read states whether non-residents may buy; dispensaries require a valid government-issued photo ID.
Sources
- Missouri Revisor of Statutes: Missouri Constitution, Article XIV, Section 2: Marijuana legalization, regulation, and taxation (consulted 9 October 2026) · all sources
- Missouri Department of Health and Senior Services: Patient & Consumer FAQs (consulted 9 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)) |
Missouri and neighbouring states
| State | Possession for personal use | Growing at home | Sale to consumers | Use or carrying in public places | Medical cannabis | 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 |
| Arkansas | ⚠ Not yet verified | ⚠ Not yet verified | ⚠ Not yet verified | — | Yes: medical card, licensed dispensaries | Visiting medical patients: 90-day card |
| 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 |
| Kansas | Criminal offence | No (felony) | No | — | No programme; CBD-oil defence only | — |
| Kentucky | Class B misdemeanour, max 45 days | No (licensed cultivators only) | Trafficking is an offence | Patients only; no smoking, no vaping in public | Medical programme (KRS 218B) | Visiting patients 21+ with out-of-state card |
| 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 |
| Oklahoma | Criminal offence without a medical licence | ⚠ Not yet verified | Prohibited (licensed medical dispensaries only) | — | Licensed patients (broad access) | Out-of-state medical patients: 30-day licence |
More rules in Missouri
- Car speed limitsBuilt-up areas: 25 mph unless posted · Outside built-up areas (single carriageway): 60 mph
- Minimum age for a car driving licenceMinimum age for a car licence: 16 (intermediate licence) · Earliest age to drive a car supervised: 15 (instruction permit)
- E-bikes and speed pedelecsLegal class: Class 1, 2, 3 (bicycle) · Minimum age: 16+ for Class 3
- FireworksConsumers may buy and use category F2 fireworks: Yes (permitted retailers) · Minimum age to buy: 14 (under 14 with parent)
- Knives and pepper sprayFolding pocket knives: Concealed carry banned only in restricted areas
- Statutory minimum wageNational statutory minimum wage: Yes · Current adult minimum wage (gross): $15.00 per hour
- 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, driver and front-seat passengers · Seat belt compulsory in rear seats: No for adults; children under 16 must be secured
- 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 (supplying under 21 banned) · Minimum age to buy spirits: 21 (supplying under 21 banned)
- 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.