Washington Revised Code Title 29A. Elections § 29A.08.170. Registration at age 16 and 17

(1) A person may sign up to register to vote if he or she is sixteen or seventeen years of age, as part of the future voter program.

(2) A person who signs up to register to vote may not vote until reaching eighteen years of age unless the person is seventeen years of age at the primary election or presidential primary election and will be eighteen years of age by the general election.

(3) A person who signs up to register to vote may not be added to the statewide voter registration list of voters until such time as he or she will be eligible to vote in the next election.