Washington State Senate seat · lines in effect since 2024
Washington Legislative District 21
A district of about 149,000 people, 44% of adults with a bachelor's degree. It votes D+38.2 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 | 2026 | |
|---|---|---|
| Governor | D+32.3 | No race |
| Washington State Senate | No race | D+44.0 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: Washington Secretary of StateUpdated 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 21.
Higher than 71% of seats.
Lower than 71% of seats.
Higher than 62% of seats.
Higher than 77% of seats.
Higher than 79% of seats.
Denser than 71% 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 3246% college gradsD+55.5Held DDistrict 22
45% college gradsD+39.1Not up in 2026District 44
48% college gradsD+21.7Held DDistrict 1
61% college gradsD+46.4Not 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
Who has held it
These lines took effect in 2024.
- Marko Liias (D)
2027– · Won 2026 by 44.0
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)