For recreational cannabis, the possession limit for minors is zero. Every state with legal adult-use cannabis, plus Washington, D.C., sets the minimum age at 21, so anyone under 21 cannot legally buy, hold, or carry marijuana. Federal law goes further: cannabis remains a Schedule I controlled substance under the Controlled Substances Act, making possession illegal at any age on federal land and for federal purposes.
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Do minors have any legal possession limit?
No. Legalization laws carve out an age gate of 21, and an age gate is not a limit that a minor can stay under. It is a bar.
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Some states treat very small amounts as a civil infraction for people under 21 instead of a criminal offense. That reduces the penalty. It does not create a legal allowance, and the product is still subject to seizure.
Cannabis Possession Limits Federal vs State: Which Number Applies to You
What are the possession limits for minors with a medical cannabis card?
Medical programs work differently. Most states require a parent or legal guardian to register as the minor patient's designated caregiver, and that adult buys, holds, and transports the product.
When a state does issue a card to a patient under 18, the allowed amount usually matches the adult patient limit in that state. The caregiver must keep the cannabis in their control, not the minor's backpack or bedroom.
States also vary on which conditions qualify for a minor. Some restrict pediatric certification to severe epilepsy, cancer, or terminal illness, while others allow a broader list.
Which age thresholds matter for cannabis possession?
- Under 18: handled in juvenile court in most states, with parental notification and often a diversion or drug education program.
- 18 to 20: treated as an adult offense in many states, even where cannabis is legal for people 21 and older.
- 21 and older: the state's adult possession limit applies, commonly 1 to 3 ounces of flower depending on the state.
What penalties can a minor face for cannabis possession?
Typical consequences include fines, mandatory drug education classes, community service, probation, and a juvenile record. Several states also suspend or delay a driver's license for a drug offense, sometimes until the person turns 21.
School discipline is separate from criminal court and often carries its own penalties, including suspension or loss of extracurricular eligibility. Some states also require a screening or assessment before a case can be closed.
Does a parent's possession limit cover their child?
No. Adult limits apply to the adult who holds the cannabis, and that adult can face extra charges for leaving it accessible to a minor. Those charges may include contributing to the delinquency of a minor or child endangerment.
At home, the practical rule is the same as with alcohol or prescription medication: locked, labeled, and out of reach.
What about CBD, hemp, and delta-8 products?
Hemp-derived CBD containing no more than 0.3 percent THC is federally legal, but many states set their own minimum purchase age of 18 or 21 for hemp products. Delta-8 THC sits in a gray zone, legal in some states and banned in others, and age gates of 21 are increasingly common.
A minor who assumes a hemp product is unrestricted can still face a school or civil violation. Check the specific state's law before assuming any cannabinoid product is allowed.
What should a minor do if stopped by police?
- Stay calm, keep hands visible, and do not run.
- Ask whether you are free to leave.
- Say clearly that you do not consent to a search.
- Ask for a parent or guardian and for a lawyer before answering questions.
- Contact a criminal defense attorney in that state if any citation or charge is filed.
Frequently asked questions
Can a 19-year-old legally possess cannabis in a legal state?
No. In adult-use states the minimum age is 21, so a 19-year-old is treated as underage. Some states reduce the penalty to a civil fine for people 18 to 20, but the possession itself remains unlawful.
Can a minor get a medical cannabis card without a parent?
Generally no. Most states require a parent or legal guardian to act as caregiver for a patient under 18. A small number of states address emancipated minors, but the rules differ enough that the specific state program has to be checked.
How much cannabis can a minor carry in a legal state?
None for recreational purposes, regardless of the adult limit. If an adult's one-ounce allowance is used up by a 17-year-old, the adult can be charged as well as the minor.
Does a first offense stay on a minor's record?
It depends on the state and the outcome. Diversion programs and juvenile adjudications can often be sealed or expunged, and many states allow expungement once the person turns 18 or completes probation.
Laws, age gates, and penalty tiers change often and differ by state. This guide is general information, not legal advice, so confirm the current statute or consult an attorney in the relevant state.