In the United States, you must be 21 or older to buy cannabis for adult use, and 18 or older in most states to buy medical cannabis. No federal age exists for marijuana purchase because federal law still bans the plant. Hemp-derived CBD with 0.3% THC or less has no federal age minimum, though some states set one at 18 or 21.
Federal Law Sets No Age, States Do
Cannabis remains a Schedule I drug under the Controlled Substances Act, so no federal statute names an age for buying it. States that legalized cannabis write their own age limits, ID rules, and purchase caps. The answer changes when you cross a state line.
Age Verification Rules for Buying Cannabis: ID and Age Limits
Hemp is different. The 2018 Farm Bill removed hemp from the drug schedule when it contains 0.3% THC or less on a dry weight basis. Congress left age rules for hemp products to the states.
What Age Do You Need to Buy Recreational Cannabis?
Every state with an adult-use program sets the minimum at 21. That matches the federal minimum drinking age and covers flower, vapes, edibles, concentrates, and topicals. You must show a valid government ID at the door and again at checkout in many shops.
- Recreational buyers: 21 and older
- Medical patients: 18 and older in most states, or younger with a caregiver
- Hemp CBD: no federal minimum, state rules vary
Some states also cap how much you can buy in one visit. A common limit is one ounce of flower or its equivalent in concentrates and edibles. Dispensaries track these limits through state seed-to-sale systems.
What Age Do You Need for Medical Cannabis?
Most medical states set the patient age at 18. Patients under 18 need a parent or legal guardian to register as a caregiver. The caregiver buys and holds the product on the minor's behalf.
Can Minors Buy Medical Cannabis?
Minors cannot buy cannabis on their own in any state. A registered caregiver must make the purchase. Some states add a second requirement, such as a doctor's note for a specific condition or sign-off from two physicians.
Does CBD Have Age Limits?
Hemp-derived CBD sold online and in stores has no federal age minimum. Many retailers still set their own rule at 18 or 21. States that regulate intoxicating hemp cannabinoids, including delta-8 THC, do set age limits, often 21.
Hemp CBD vs Cannabis-Derived CBD
CBD pulled from hemp with 0.3% THC or less is legal under federal law. CBD from a high-THC cannabis plant falls under state cannabis rules. The source plant decides which age rule applies.
The FDA has not approved CBD as a dietary supplement and has cleared only one prescription cannabis-derived drug, for rare seizure disorders. That gap leaves labeling and sales rules to the states.
What ID Works for a Cannabis Purchase?
Dispensaries accept government-issued photo IDs that show your birth date. Expired IDs fail. So do damaged cards with unreadable text.
- State driver's license or state ID card
- U.S. passport or passport card
- Military ID
- Tribal ID from a federally recognized tribe
- Foreign passport in some states
Rules on out-of-state IDs differ. Some states let you buy with any valid government ID. Others require in-state residency for medical purchases. Recreational sales often accept out-of-state IDs, though purchase limits may be lower.
Do Stores Scan Your ID?
Many dispensaries scan the barcode or magnetic stripe on your license. The scan records your name, birth date, and visit in the state traceability system. Scanning helps a shop prove it checked age if a regulator audits the store.
Some states ban storing that data past a set window. Ask the shop what it keeps if that matters to you.
What Happens if You Use a Fake ID?
Using a fake ID to buy cannabis brings real penalties. Possession of a false government ID is a crime in every state. Dispensaries also file incident reports with police, and a flagged fake ID can lead to charges for the buyer.
Employees who accept a fake ID face fines and job loss. Most shops train staff to spot altered cards.
What Are the Rules for Cannabis Delivery and Online Orders?
Delivery follows the same age rule as the store. The driver checks your ID at the door and often scans it. You must be present, and in most states you must sign for the order.
Online ordering is a reservation, not a purchase. You pay and take possession in person after the ID check. A few states allow curbside pickup, but the check still happens.
Some states ban delivery outright. Others limit it to medical patients or to certain cities.
How Do Dispensary Employees Check Age?
Budtenders check the birth date math, the photo match, the hologram, and the card's feel. They watch for a vertical layout on licenses issued to people under 21, though a vertical card stays valid once you turn 21 in most states.
Many shops require a second check at the register. That double check protects the shop from a single missed fake.
Penalties for Selling to Underage Customers
Selling cannabis to someone under 21 can cost a dispensary its license. States levy fines that reach thousands of dollars per violation. Repeat offenses can bring license suspension or revocation and criminal charges for the employee.
Regulators run compliance checks with underage decoys. A failed check often triggers a fine and a required retraining course.
Frequently Asked Questions
Is the legal age for cannabis 18 or 21?
It depends on the product and the state. Recreational cannabis is 21 everywhere it is legal. Medical cannabis is 18 in most medical states, with a caregiver needed for younger patients.
Can you buy CBD under 21?
Yes, in most places. Hemp CBD has no federal age limit, and many stores sell it to anyone. Some states and retailers set their own minimum at 18 or 21, mostly for products with intoxicating cannabinoids.
Does a vertical driver's license work at a dispensary?
Yes, if you are 21 or older and the ID is valid. The vertical layout marks licenses issued to minors, but the birth date controls. An expired card will not work no matter its layout.
Can a tourist buy cannabis?
In most adult-use states, yes. You need a valid government photo ID from any country. Some states restrict medical purchases to residents.
Do you need ID for a CBD order shipped to your home?
Federal law does not require it, and most online CBD sellers do not check age. Retailers set their own policy, and some ask for a birth date at checkout.