Top-two primary
All candidates run in one primary regardless of party and the two with the most votes advance, so two candidates of the same party can meet in November. The forecast then marks the seat as safe for that party.
Washington › Washington House of Representatives · State legislature · November 3, 2026 · Updated Oct 16, 2026
Washington Legislative District 21
D vs D2 seatsTop twoSame-party general election. Two Democrats advanced to November: the seat stays Democratic.
Strom Peterson has no major-party opponent.
Strom Peterson has no major-party opponent.
2 seats in this district
2.0 D · 0.0 R expected of 2 seats
2.0 D · 0.0 R expected of 2 seats
How this race is decided
Two House positions per district
Each of the 49 districts elects one senator and two representatives, who run for separate positions (1 and 2). The forecast treats each position as its own race.
The candidates
DemocraticIncumbent
Strom Peterson
- Experience
- State legislature
Democratic
Jason Moon
DemocraticIncumbent
Lillian Ortiz-Self
- Experience
- State legislature
Libertarian
Bruce Guthrie
The district
Lean D+38: how much more Democratic or Republican than the nation it votes for president.
Presidential vote
Precinct results re-aggregated to the current district lines.
Who lives here
- Population
- 148,693
- People per km²
- 1,002
- Adults with a B.A.+
- 44%
- White, no degree
- 34%of adults
- White 56%
- Hispanic 12%
- Black 5%
- Asian 17%
- Other / multiracial 10%
American Community Survey 2020–2024, aggregated from census tracts.
Past results
Results in the same-numbered district; earlier elections may have used different lines.
2024
139,187 votes · D+33.7✓ Strom Peterson (D)33.6%
✓ Lillian Ortiz-Self (D)33.4%
Riaz Khan (R)16.6%
Kristina Mitchell (CST)16.2%
2024 President Vote in this district
71,994 two-party votes · D+37.9 · D+39.4 vs. the nation✓ Kamala Harris (D)69.0%
Donald Trump (R)31.0%
2020 President Vote in this district
79,044 two-party votes · D+39.0 · D+34.4 vs. the nation✓ Joe Biden (D)69.5%
Donald Trump (R)30.5%
2016 President Vote in this district
60,021 two-party votes · D+35.7 · D+33.5 vs. the nation✓ Hillary Clinton (D)67.9%
Donald Trump (R)32.1%
Neighboring districts
LD-1Davina DuerrMaggie Wang2 seats>99%Dem.>99%Dem. LD-10Clyde ShaversRobert "Chili" Hicks2 seats98%Dem.90%Dem. LD-23Tara SimmonsLance Byrd2 seats>99%Dem.>99%Dem. LD-32Lauren Davis—D vs D2 seats>99%Dem.>99%Dem. LD-38Julio Cortes—D vs D2 seats>99%Dem.>99%Dem. LD-44Brandy DonaghyChris Elder2 seats>99%Dem.99%Dem.