2008Final results
2008 election for Washington Legislative District 18
Washington State Senate · Washington
Joseph Zarelli (R) won with 55.0% of the vote, defeating Jon Haugen (D) by 10.1 points.
Joseph ZarelliRepublican · winner · incumbent
55.0%39,311
Jon HaugenDemocrat
45.0%32,127
71,438 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 2008
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET