The 2004 Washington State Senate election was held on November 2, 2004, in which about half of the state's 49 legislative districts choose a state senator for a four-year term to the Washington State Senate. The other half of state senators are chosen in the next biennial election, so that about half of the senators, along with all the members of the Washington State House of Representatives, are elected every two years. 24 seats were up for their regular election this cycle, while 4 seats held special elections due to resignations by their incumbents, for a total of 28 seats on the ballot. Republicans held 15 of the seats and Democrats held the remaining 13. Democrats successfully flipped two seats in the general election. Summary of results Detailed results The 2004 election utilized an open primary system. Primary results can be found here and general election results can be found here. District 1 District 2 District 3 District 4 District 5 District 6 District 8 District 9 District 10 District 11 District 12 District 14 District 16 District 17 District 18 District 19 District 20 District 22 District 23 District 24 District 25 District 27 District 28 District 38 District 39 District 40 District 41 District 49 References See also 2004 Washington (state) elections Washington State Senate elections Washington Senate