Washington State Senate seat · lines in effect since 2024
Washington Legislative District 20
A district of about 157,000 people, 24% of adults with a bachelor's degree. It votes R+28.0 relative to the nation for president.
Where it sits among all 49 seats
Every Washington State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2020 | 2024 | |
|---|---|---|
| U.S. Senate | No race | R+22.2 |
| Governor | R+33.3 | R+27.8 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 49 seats. Small marks are other seats in Washington. The black marker is District 20.
Lower than 90% of seats.
Higher than 98% of seats.
Lower than 71% of seats.
Lower than 96% of seats.
Lower than 92% of seats.
Less dense than 88% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 19WashingtonR+15.4Not up in 2026District 7
22% college gradsR+33.0Held RDistrict 4
27% college gradsR+19.6Not up in 2026District 39
26% college gradsR+7.6Not up in 2026
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET