Prosecutor Tony Golik said his office will dismiss all cases that fit the requirements of the new law -- those where the defendants are at least age 21 and the quantity of marijuana was less than 1 ounce.
Initiative 502, which legalizes marijuana use of 1 ounce or less in Washington, goes into effect December 6.
Last week King and Pierce county prosecutors said they were dropping similar cases.
Golik told the Columbian that the dismissals are "straight-up possession cases."
Golik couldn't estimate the number of cases affected by his decision.
More Northwest Headlines
2 Yakima County men sentenced for killing eagles USGS awards $4M in Northwest, California for earthquake early warning systems Commuter train hits vehicle in Puyallup, kills 1 woman Ex-tribal police chief pleads guilty to stealing from Swinomish Tribe Hearing Friday on suit over Kurt Cobain death-scene photos Guilty plea in crash through Sammamish home that killed 2 Suit seeks to block anti-tax measure from Washington ballot Shell icebreaker retreats after showdown with protesters
Our new comment system is not supported in IE 7. Please upgrade your browser here.