2018Flipped from RepublicanFinal resultsIncumbent defeated
2018 election for Washington Legislative District 30
Washington State Senate · Washington
Claire Wilson (D) won with 54.2% of the vote, defeating Mark Miloscia (R) by 8.5 points, a seat Republicans won last time.
Claire WilsonDemocrat · winner
54.2%25,505
Mark MilosciaRepublican · incumbent
45.8%21,517
47,022 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 2018
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET