Washington: How to vote, where to vote and what’s on the ballot.

All Washington residents can still cast ballots in Tuesday’s primary election regardless of whether they previously registered to vote, thanks to the state’s same-day registration laws.

Here’s what to else know:

How to vote

Washington is a vote-by-mail state, so every resident who was registered to vote should have received a ballot in the mail. Ballots must be postmarked before the end of Election Day to be counted. They can also be dropped off at a designated drop box until 8 p.m. Pacific time.

Want to track your ballot? Visit the secretary of state’s website.

To take advantage of the state’s same-day voter registration, check your county website to learn where to go and how to pick up a ballot.

Where to vote

Voters who would like assistance may vote in person at a designated accessible voting center. Learn more by visiting your county’s website, which can be located here. County websites will also direct voters to their nearest drop box location.

Voting centers and drop boxes will both be open from 8:30 a.m. to 8 p.m. Pacific time.

What’s on the ballot

Former President Donald J. Trump has endorsed primary challengers against Representatives Dan Newhouse and Jamie Herrera Beutler, both of whom were among the 10 House Republicans who voted to impeach Mr. Trump.

Washington uses a top two primary system, which means that the two candidates who receive the most votes on Tuesday will advance to the general election regardless of their party affiliation. Voters will have the option to vote for their preferred candidate of any party, and ballots will note which party each candidate prefers.

See exactly what will appear on your ballot by entering some personal information here.