King County Ordinance 16604 banned consumer fireworks in unincorporated areas in 2010; Washington RCW 70.77 lets cities and counties impose stricter rules, and possessing or discharging fireworks outside a permitted display is a misdemeanor.
Consumer fireworks are banned in unincorporated King County under Ordinance 16604 (effective 2010), enforced by KCSO and county fire marshals. Washington's State Fireworks Law, RCW 70.77, allows local governments to adopt stricter standards, and many King County cities (including Seattle) have full bans while others permit limited Fourth of July windows. Public displays still require state and local permits, fire-marshal review, and licensed pyrotechnicians. Possessing or discharging illegal fireworks countywide is typically a misdemeanor. The Washington State Patrol Fire Protection Bureau licenses sellers and display operators statewide.
Discharging or possessing consumer fireworks in unincorporated King County or in cities with bans is a misdemeanor under local code and RCW 70.77, with fines and confiscation.
King County, WA
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See how King County's fireworks rules stack up against other locations.
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