Cannabis in Washington is legal for both medical and adult use.

Washington legalized cannabis for medical use in 1998  though ballot initiative I-692. In 2012, Washington became the first U.S. state to legalize cannabis for adult use (through ballot initiative  I-502).

In March 2020, Gov. Inslee signed HB 2870 to create a state level social equity program.

Within Washington’s adult use framework adults 21+ may possess up to 1 ounce of usable marijuana , 16 ounces of marijuana-infused edibles in solid form, 72 ounces in liquid form, and 7 grams of marijuana concentrates. Individuals are not permitted to grow cannabis within their home for adult use. Within Washington’s medical framework Medical patients may possess up to 3 ounces of usable marijuana; Forty-eight ounces of marijuana-infused product in solid form; two hundred sixteen ounces of marijuana-infused product in liquid form; or twenty-one grams of marijuana concentrates. The qualifying patient may also home grow up to six plants and possess up to eight ounces of useable marijuana produced from his or her plants.