About 38 percent of Washington's 3.9 million registered voters had already returned their ballots as of last Thursday, according to the Secretary of State's office.
State Elections Co-Director Katie Blinn says this may indicate an overall turnout above their 81 percent prediction.
She says voters this year are excited over the heated candidate races and statewide ballot measures.
If you haven't yet returned your ballot, Blinn says the best way to make sure it gets counted on time is to drop it off at one of the ballot drop boxes by 8 p.m. election day.
Drop box locations can be found at www.myvote.wa.gov.
If you still plan on mailing in your ballot, check the pick-up time on your outgoing mail, and be sure your ballot gets postmarked no later than tomorrow.