Washington Marijuana Laws (2026): Limits, Public Use, Home Grow, Driving and Taxes

By James Buddsey · Updated October 15, 2026

Yes. Under Washington marijuana laws, adults 21 and older can legally buy and possess up to 1 ounce of cannabis flower, 7 grams of concentrate, 16 ounces of solid edibles and 72 ounces of infused liquids, but only from state-licensed stores. Public use is a civil infraction, home growing is legal only for registered medical patients, delivery is not allowed, and recreational purchases carry a 37% excise tax plus sales tax.

Washington legalized adult-use cannabis in 2012 with Initiative 502, and the first licensed stores opened in 2014. More than a decade later, the rules are stable but often misunderstood, especially by visitors. This guide covers what the law says as of October 2026, with links to the statutes and regulations behind each rule. It is general information, not legal advice.

Washington Cannabis Laws at a Glance

Is Marijuana Legal in Washington State?

Yes, for adults 21 and over. Initiative 502 made it legal under state law to possess limited amounts of cannabis and to buy it from stores licensed by the Washington State Liquor and Cannabis Board (LCB). Washington’s medical program, which dates back to 1998, continues alongside adult use and gives registered patients higher limits and tax breaks.

Three things are still illegal for everyone: selling cannabis without a licence, using it in public, and driving while impaired. Cannabis also remains illegal under federal law for adult use, which matters on federal land, at airports and at state borders. See our guide to federal marijuana law in 2026 for the latest on rescheduling.

How Much Cannabis Can You Buy and Possess in Washington

Adults 21 and older may possess, and a store may sell to one customer in a single transaction, up to:

• 1 ounce (28 grams) of usable cannabis (dried flower)
• 7 grams of cannabis concentrate, including vape cartridges, wax, shatter and rosin
• 16 ounces of cannabis-infused product in solid form, such as gummies, chocolates and baked goods
• 72 ounces of cannabis-infused product in liquid form, such as drinks and tinctures

These amounts come from RCW 69.50.360. Retailers may not help a customer get more than the personal possession amount, so buying a full ounce, leaving and coming straight back for another is not allowed. Washington’s possession limit also applies at home for recreational users; there is no larger “at home” allowance like Oregon’s 8 ounces.

Registered medical patients can buy up to three times the adult limits at medically endorsed stores: 3 ounces of usable cannabis, 48 ounces of solid infused product, 216 ounces of liquid infused product or 21 grams of concentrate, under RCW 69.51A.210.

For a city-level walk-through, see the purchase limits guides for Seattle, Spokane, Tacoma and Vancouver.

Where You Can and Cannot Use Cannabis in Washington

Washington law makes it a civil infraction to open a cannabis package or consume cannabis “in view of the general public or in a public place” under RCW 69.50.445. It is a class 3 civil infraction, which carries a maximum penalty of $50 plus statutory assessments under RCW 7.80.120. That is a ticket, not a crime, but the places it covers are broad.

Not allowed

• Streets, sidewalks, parks, beaches and trails, including city parks and state parks
• Bars, restaurants, patios and any business open to the public
• Ferries, buses, light rail and other public transportation
• Anywhere visible from a public place, such as a front porch facing the street
• Federal land, including national parks, national forests and military bases, where cannabis is illegal under federal law

Allowed

• Private homes and private property, with the owner’s permission
• Rentals and hotels only if the property allows it; most hotels ban smoking of any kind

Washington has no licensed cannabis lounges. A bill to allow consumption events and lounges, HB 1932, did not pass in the 2026 session. Landlords may ban smoking in leases, and employers may still enforce drug-free workplace policies. City guides cover the specifics: where to smoke in Seattle, Spokane and Tacoma.

Washington Dispensary Rules: ID, Hours and Payment

• ID: Every customer must show a valid, unexpired government photo ID proving they are 21 or older. Out-of-state driver’s licences and passports are accepted. Stores check ID at the door, and minors cannot enter even with a parent.
• Hours: State rules allow retail sales from 8 a.m. to midnight under WAC 314-55-147. Most stores open at 8 or 9 a.m. and close between 10 p.m. and midnight, and some cities set shorter hours. See the late-night guides for Seattle, Spokane and Tacoma.
• Payment: Most stores take cash and many take debit cards, often through cashless ATM systems. Credit cards are rarely accepted because cannabis is still federally illegal for adult use, and many stores have an ATM on site.
• Delivery and online orders: Washington does not allow cannabis delivery to consumers. Many stores let you reserve an order online, but you must pick it up and pay in person with ID.
• Tribal stores: Several tribes operate cannabis stores under compacts with the state. Their rules on purchase limits and ID mirror state law, though tax arrangements differ. See our guide to tribal dispensaries near Tacoma.

Every store in our Washington dispensary directory holds an active LCB licence, and each listing shows the licence number so you can check it yourself. Here is how we verify listings.

Medical Cannabis in Washington: Recognition Cards and Endorsed Stores

Washington’s medical program runs through the Department of Health. To use it, a patient needs an authorization from a qualifying health care provider and must be entered into the state’s medical cannabis authorization database at a store with a medical endorsement. The store then issues a recognition card.

Registered patients with a recognition card get several benefits:

• Higher limits: up to three times the adult-use amounts at medically endorsed stores.
• Tax savings: no state or local sales tax on qualifying purchases, and an exemption from the 37% excise tax on products that meet Department of Health standards under a 2024 law (HB 1453).
• Age: patients 18 to 20 can buy at endorsed stores, and minors can be served through a designated provider.
• Home growing: see the next section.

Not every store has a medical endorsement. Our directory marks endorsed stores with a Medical badge, and the medical guides for Seattle, Spokane, Tacoma and Vancouver list them by neighborhood. Washington does not honor out-of-state medical cards for these benefits.

Growing Cannabis at Home in Washington

Washington is one of the few legal states that does not allow recreational home growing. Growing cannabis without medical authorization remains a crime under state law, even one plant. Bills to legalize home cultivation for adults, most recently SB 6204 in 2026, have moved through committee but have not become law.

Medical patients are the exception. Under RCW 69.51A.210:

• Patients entered in the authorization database may grow up to 6 plants at home and keep up to 8 ounces of usable cannabis from them.
• If the provider recommends more, a database patient may grow up to 15 plants and keep up to 16 ounces at home.
• Authorized patients who are not in the database may grow up to 4 plants and keep up to 6 ounces.

Cities and counties can add limits, such as a cap on plants per housing unit, so check local code before you start.

Driving and Cannabis in Washington: the 5 ng/mL THC Limit

Driving with 5.0 nanograms or more of active THC per milliliter of blood within two hours of driving is a per se DUI under RCW 46.61.502. Police can also charge impairment below that number based on driving and field observations. Drivers under 21 face a stricter rule: any active THC above zero.

Open containers matter too. Under RCW 46.61.745, having an opened cannabis package in the passenger area of a vehicle on a public road is a traffic infraction. Keep purchases sealed and in the trunk; the glove box does not count as outside the passenger area.

Taking Cannabis Across Washington State Lines, Borders and Airports

• To Oregon: Both states are legal, but carrying cannabis across the Columbia River is still illegal under federal law, and neither state’s licensed market allows products to cross the border. Vancouver and Portland shoppers should buy on the side where they will use it. See our Oregon vs. Washington comparison and the Oregon marijuana laws guide.
• To Idaho: Idaho has not legalized cannabis in any form, and possession is a crime there. Spokane is a common stop for Idaho visitors, which is why we wrote a guide for Idaho visitors to Spokane.
• To Canada: Cannabis is legal in Canada, but carrying it across the border in either direction is illegal and can lead to criminal charges and being barred from entry.
• Flying: The TSA follows federal law and refers cannabis found during screening to local police. Carrying cannabis on any flight, including within Washington, is illegal under federal law. See our guide to dispensaries near Sea-Tac for what to do before you fly.
• Military bases: Joint Base Lewis-McChord and other installations are federal property, and service members are subject to military drug rules regardless of state law. Read our JBLM guide.

Washington Cannabis Taxes in 2026

Washington has some of the highest cannabis taxes in the country. Recreational purchases carry:

• a 37% cannabis excise tax, set by RCW 69.50.535 and charged on the retail sale, and
• state and local sales tax: the 6.5% state rate plus whatever local rate applies where you buy.

Many stores post prices with the excise tax already included, so compare final prices rather than shelf tags. Registered medical patients skip the sales tax and, on qualifying products, the excise tax.

Lawmakers have proposed changing the excise tax, including HB 2075, which would add higher rates for high-THC products. As of October 2026 it has not passed, and the 37% rate still applies.

What Changed in Washington Cannabis Law Recently

• Federal rescheduling (2026): In April 2026 the Justice Department moved marijuana held under a state medical marijuana licence, and FDA-approved marijuana products, to Schedule III. Adult-use cannabis, including Washington’s recreational market, remains in Schedule I while a broader rescheduling proceeding is on hold. Details are in our federal law guide.
• Home grow (2026): SB 6204 advanced in committee but did not become law. Recreational home growing is still illegal.
• Lounges (2026): HB 1932 on consumption events and lounges did not pass.
• Medical excise exemption (2024): HB 1453 exempted qualifying patients from the 37% excise tax on DOH-compliant products.

Washington Marijuana Laws FAQ

Find a Licensed Dispensary in Washington

Browse every licensed store in our Washington dispensary directory, or go straight to a city: Seattle, Spokane, Tacoma, Vancouver, Bellingham, Everett and Olympia. New to dispensaries? Start with our guide to finding the best dispensary and our strain directory.

Neighboring state guides: Oregon · Idaho · All state cannabis laws

This guide is general information about Washington law as of October 2026, not legal advice. Laws change; check the linked statutes or the Washington State Liquor and Cannabis Board for the current rules.