Oregon State Senate seat · lines in effect since 2022
Oregon Senate District 4
A district of about 146,000 people, 38% of adults with a bachelor's degree. It votes D+41.3 relative to the nation for president.
Where it sits among all 30 seats
Every Oregon 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
Who lives here, compared
Grey bars show the spread of all 30 seats. Small marks are other seats in Oregon. The black marker is District 4.
Higher than 62% of seats.
Higher than 59% of seats.
Lower than 62% of seats.
Higher than 52% of seats.
Higher than 55% of seats.
Less dense than 52% 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 736% college gradsD+31.2Held DDistrict 8
43% college gradsD+24.6Held DDistrict 13
50% college gradsD+30.0CountingDistrict 20
35% college gradsD+14.8Held 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
Who has held it
These lines took effect in 2022.
- Floyd Prozanski (D)
2023– · Won 2022 by 64.1, 2026 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)