Is Recreational Marijuana Legal in Washington State?

Yes, recreational marijuana is legal in Washington state for adults 21 and older, who can buy it from licensed retail stores and use it in private.¹ Voters approved Initiative 502 in 2012, and the Washington State Liquor and Cannabis Board regulates everything from cultivation through the register.² Legal does not mean unrestricted, though. The state caps how much you can carry, bans public use entirely, treats stoned driving like drunk driving, and leaves cannabis users exposed to a serious federal problem around firearms.

How Much You Can Buy and Carry

You need to be 21 with a valid photo ID to walk into a licensed store.³ Expect prices to run higher than the shelf tag suggests, because Washington adds a 37% excise tax on retail cannabis.

Possession is capped at:

One ounce of usable marijuana (flower)
16 ounces of solid edibles
72 ounces of liquid infused product
Seven grams of concentrate

Go over by 40 grams or less and you face a misdemeanor; officers may route you to treatment or diversion instead of charges.⁴ Larger overages become a gross misdemeanor punishable by up to 180 days in jail and a $1,000 fine, rising to 364 days if you have two or more prior possession convictions after July 2023.⁵

One rule catches people off guard: handing cannabis to a friend is technically a felony. Only licensed retailers can legally transfer marijuana to another person. Enforcement against casual sharing at a party is rare, but the statute carves out no exception for it.³

Where You Can Legally Use It

Public consumption is banned statewide. No smoking, vaping, or edibles in parks, on sidewalks, at bus stops, or anywhere else the public has access. Washington’s Clean Indoor Air Act also prohibits cannabis in indoor public spaces and workplaces, the same way it bars cigarette smoking.

That leaves your own home, or a private residence where the owner permits it. Hotels, apartment buildings, and landlords can prohibit cannabis use on their property regardless of state law, and lease agreements commonly do.

Can You Grow Your Own?

Not for recreational use. Washington is one of the few legalization states that does not allow adults to grow a personal plant count at home.⁶ Only licensed businesses can cultivate commercially.

Medical patients are the exception. A qualifying patient registered in the state’s medical cannabis authorization database may grow up to six plants, or up to 15 if their healthcare provider recommends more. Authorized patients who do not register are capped at four plants.⁷

Driving After Using Marijuana

Washington treats a cannabis DUI the same as an alcohol DUI. The per se limit is 5 nanograms of THC per milliliter of blood, measured within two hours of driving. Hit that number and you are guilty regardless of how you appeared behind the wheel.⁸ An officer can still charge you below that threshold if they determine you were actually impaired.

A first offense is a gross misdemeanor carrying at least 24 consecutive hours in jail (up to 364 days), fines of $350 to $5,000, and a license suspension of at least 90 days. Refusing a blood test raises the license revocation to two years.⁹ A third DUI within 15 years is a class B felony.⁸

Washington also has an open-container rule for cannabis. Any marijuana inside a vehicle must sit in the trunk, in another area inaccessible to the driver and passengers, or in a sealed, unopened package. The glove compartment does not qualify as inaccessible. A violation is a traffic infraction even if you are completely sober.¹⁰

Marijuana and Guns Do Not Mix

This is the biggest trap for Washington cannabis users. Federal law prohibits any user of a controlled substance, marijuana included, from possessing a firearm or ammunition. State legalization does not change that. 18 U.S.C. § 922(g)(3) makes it a felony punishable by up to 15 years in federal prison.¹¹

ATF Form 4473, which you fill out when buying from a licensed dealer, asks directly whether you use marijuana. Checking yes blocks the sale. Checking no while using is itself a federal felony. The prohibition applies to guns you already own, too, which means a longtime gun owner who starts buying from a Washington dispensary is technically committing a federal crime by keeping those firearms in the house. The U.S. Supreme Court is reviewing the issue in U.S. v. Hemani, with a decision expected by mid-2026, but until that ruling comes down the current rule governs.

Travel and Federal Property

Marijuana remains a Schedule I controlled substance under federal law.¹² The practical consequences hit most often at the edges of the state and on federal land.

Carrying cannabis across any state line is a federal crime, even a drive from Washington to Oregon where both states have legalized. Airports sit on federal property, so TSA screening is federal territory. National parks, military installations, and federal buildings inside Washington are all off-limits for cannabis as well. Stay within Washington and off federal land and federal enforcement is unlikely day to day; cross any of those lines and state law offers no cover.

Can Your Employer Fire You for Using Marijuana?

Since January 2024, Washington employers cannot refuse to hire you solely because you use cannabis off the job, and they cannot disqualify you based on a pre-employment drug test that only detects nonpsychoactive cannabis metabolites.¹³

The protection has real limits. It does not cover:

Positions with a general authority law enforcement agency
Firefighters, first responders, and 911 dispatchers
Corrections officers and staff responsible for custody and security
Jobs requiring a federal background investigation or security clearance
Positions in the aerospace or airline industries
Safety-sensitive roles the employer has identified before you apply, where impairment creates a substantial risk of death

Federal drug-testing requirements still override state law when they apply. And the statute covers hiring only. Your employer can still discipline or fire you for being impaired on the job.¹³

Clearing an Old Marijuana Conviction

If you were convicted of marijuana possession before legalization, Washington has a petition process to vacate the record. The state courts publish a specific form for cannabis conviction vacatur, and a granted petition effectively erases the conviction for most purposes, which can clear the way on background checks, housing applications, and professional licensing.¹⁴ If your old charge would be legal conduct today, the paperwork is worth filing.

1
Washington Secretary of State. Initiative Measure No. 502
2
Washington State Department of Social and Health Services. Marijuana Legislation – Implementing Initiative 502
3
Washington State Department of Social and Health Services. Consumer’s Guide to Marijuana
4
Washington State Legislature. Washington Code RCW 69.50.4014 – Possession of Forty Grams or Less of Cannabis
5
Washington State Legislature. Washington Code RCW 69.50.4013 – Possession of Controlled Substance
6
Washington State Liquor and Cannabis Board. LCB Research Brief – Home Cannabis Cultivation
7
Washington State Legislature. Washington Code RCW 69.51A.210 – Cannabis and Cannabis Products Allowed
8
Washington State Legislature. Washington Code RCW 46.61.502 – Driving Under the Influence
9
Washington State Legislature. Washington Code RCW 46.61.5055 – Alcohol and Cannabis Violators – Penalty Schedule
10
Washington State Legislature. Washington Code RCW 46.61.745 – Cannabis in a Motor Vehicle
11
Office of the Law Revision Counsel. United States Code Title 18 Section 922 – Unlawful Acts
12
Drug Enforcement Administration. Drug Scheduling
13
Washington State Legislature. Washington Code RCW 49.44.240 – Cannabis Use
14
Washington Courts. Petition and Order to Vacate Cannabis Conviction