99chambers

Wisconsin State Senate seat · lines in effect since 2024

Wisconsin Senate District 25

A district of about 181,000 people, 27% of adults with a bachelor's degree. It votes R+13.1 relative to the nation for president.

Romaine Quinn (R) · since Nov 8, 2022Next election Nov 5, 2030The 2026 race →

Where it sits among all 33 seats

Every Wisconsin 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.

R+13.120th most
Democratic
Most DemocraticMost Republican17th seat · the majority lineDistrict 25

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.

20242026
U.S. SenateR+11.0No race
Wisconsin State SenateNo raceR+5.7

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 33 seats. Small marks are other seats in Wisconsin. The black marker is District 25.

Adults with a bachelor's degree27% 22nd pct · 26th of 33 in WI

Lower than 78% of seats.

White adults without a degree66% 78th pct · 8th of 33 in WI

Higher than 78% of seats.

Hispanic residents2% 0th pct · 33rd of 33 in WI

Lowest of 33 seats.

Black residents1% 3rd pct · 32nd of 33 in WI

Lower than 97% of seats.

Asian residents1% 6th pct · 31st of 33 in WI

Lower than 94% of seats.

People per square mile21 0th pct · 33rd of 33 in WI

Least dense of 33 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. 1 of the 4 flipped this year.

District 24
25% college gradsR+13.1Not up in 2026District 10
33% college gradsR+20.1Not up in 2026District 17
29% college gradsD+2.4Flipped DDistrict 12
23% college gradsR+28.9Not 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.

  1. Erik Severson (R)
    2027– · Won 2026 by 5.7

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)