Cannabis legal age in the US
The minimum age to buy cannabis for adult use is 21. Every state with legal recreational sales uses that number. That is 24 states and the District of Columbia. The rule covers purchase, possession, and consumption. Stores check photo ID at the door and again at the register.
Medical cannabis follows different rules. Age floors run from 18 down to no minimum. A patient under 18 needs a qualifying diagnosis, a physician certification, and a caregiver who buys and holds the product.
Adult-use states
Recreational sales are legal in 24 states and DC. Alaska and Colorado opened the first stores in 2014. The list runs from Maine to New Mexico. In each of these states, a sale to a person under 21 is a crime, and furnishing cannabis to a minor carries separate charges.
Medical cannabis ages
Most medical programs set 18 as the patient age. Patients below 18 need a caregiver. A few states set no age floor and leave the decision to the certifying physician. Some states allow a minor to hold patient status but name the caregiver as the only person who can buy, transport, or prepare the product. More than 35 states plus DC run medical programs.
Federal law
Cannabis sits in Schedule I of the Controlled Substances Act. There is no federal minimum age for cannabis because there is no federal legal market. Federal law sets 21 as the minimum drinking age through the National Minimum Drinking Age Act of 1984. That law ties part of highway funding to state rules.
What to bring
- Government photo ID: state ID card, driver license, passport, or military ID.
- An unexpired card. Stores turn away expired IDs.
- Residency proof for medical purchases in some states.
Penalties below the age limit
Rules differ by state. Penalties for a person under 21 range from a fine to a misdemeanor charge. Some states suspend a driver license. Buying for someone under 21 is a separate offense in every adult-use state. Check state statute for the exact penalty in your area.