Tuesday is the deadline to have a ballot postmarked or returned to an official ballot drop-off site. A ballot drop-off site in Issaquah is located at Issaquah City Hall, 130 East Sunset Way.

Secretary of State Sam Reed is predicting a 47 percent ballot return, with roughly half of those to be processed and reported by the counties on election night.

Returns will be available starting after 8 p.m. Tuesday, and will be updated instantly as counties report in their results. Most counties, including King, will report only once on election night.

There are 3.66 million registered voters in Washington. This is the first statewide general election run entirely by mail.