Washington State Senate seat · lines in effect since 2024
Washington Legislative District 40
A district of about 152,000 people, 46% of adults with a bachelor's degree. It votes D+42.5 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 | D+54.8 |
| Governor | D+27.2 | D+51.6 |
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 40.
Higher than 75% of seats.
Lower than 52% of seats.
Higher than 71% of seats.
Lower than 94% of seats.
Lower than 73% of seats.
Less dense 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 2344% college gradsD+33.7Not up in 2026District 22
45% college gradsD+39.1Not up in 2026District 5
52% college gradsD+19.5Not up in 2026District 42
34% college gradsD+11.3Held D
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