Candidate filing week for the Aug. 7 primary in Washington state began Monday for hundreds of offices, from city council to U.S. Senator.

In this year’s election cycle, 596 offices are up for election, among them U.S. Senator, all 10 of Washington’s Congressional representatives, more than 120 seats in the Legislature, 3 state Supreme Court justiceships, more than 20 superior and appeals judgeships and 438 county and local offices.

Regardless of party affiliation, the top two vote-getters in the primary advance to the fall ballot.

Among a field of 30 contesting for a U.S. Senate seat are incumbent U.S. Senator Maria Cantwell of Seattle, Republicans Susan Hutchison of Bellevue, Keith Swank of Puyallup and R.C. Smith of Vancouver, and Democrats Clint R. Tannehill pf Seattle, Mohammed Said of Ephrata and George Kalberer of Everett.

Vying to make it to the fall ballot for a shot at succeeding retiring U.S. Congressional District 8 Rep. Dave Reichert are Republicans Dino Rossi of Issaquah, Jack Hughes-Hageman of Issaquah and Gordon Allen Pross of Ellensburg, and Democrats Shannon Hader of Auburn, Issaquah resident Jason Rittereiser, Tom Cramer of Sammamish and Kim Schrier, also of Issaquah.

In the primary for U.S. Congressional District 9, incumbent Democrat Adam Smith of Renton will have to best either fellow Democrat Sarah Smith of Kent or Kent Republican Doug Basler to earn his place on the fall ballot.

Candidates for State Senator from the 30th Legislative District are Tirzah Idahosa of Federal Way and Claire Wilson of Auburn. As of Tuesday, incumbent Republican Sen. Mark Miloscia of Federal Way was unopposed by any member of his own party.

As of Tuesday afternoon, State Representative Pos. 2 Morgan Irwin of Enumclaw had no Republican challengers, with Democrat Mark Boswell of Auburn and Steve Skutt of Bonney Lake, who lists no party preference, filling out the field.

To date, Legislative District 31 State Sen. Phil Fortunato of Auburn is running unopposed by any member of his own party in his campaign to win a spot on the fall ballot against either Democrat Immaculate Ferreria or Jeff Benson of Enumclaw, who lists no party preference.

As of Tuesday afternoon, Joe Fain, Republican incumbent Legislative District 47 State Senator, and Democrat Mona Das appeared to be heading unopposed to a contest in the fall.

As of Tuesday, Legislative District 47, Rep. Position 1 incumbent Mark Hargrove had no Republican challengers, with Kent Democrat Debra Entenman and Independent Party candidate James Dillon rounding out the field.

And to date, Covington Democrat Pat Sullivan, Legislative District 47 Position 2 incumbent, will have to best either Ted Cooke and Lindsey Shumway, both Republicans, for his spot on the general election ballot.

Depending on the office sought, candidates will file in person or online either with the Secretary of State’s office or with their county elections department. Filing by mail, a seldom-used option, began April 30.

Candidates may file online with the Office of Secretary of State 24 hours a day, from May 14 at 9 a.m. through 4 p.m. May 18, and in person at the Capitol. Filings by mail will also be accepted through May 18.

Applicable filing fees vary by office. The fee amounts listed on the Secretary of State’s election website must accompany any candidate filing.

Washington’s Office of Secretary of State oversees a number of areas within state government, including managing state elections, registering corporations and charities, and governing the use of the state flag and state seal. The office also manages the State Archives and the State Library, as well as documents extraordinary stories in Washington’s history through Legacy Washington.