99chambers

Wisconsin State Senate seat · lines in effect since 2024

Wisconsin Senate District 3

A district of about 174,000 people, 52% Hispanic, 19% of adults with a bachelor's degree. It votes D+29.7 relative to the nation for president.

Tim Carpenter (D) · since Nov 5, 2002Next 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.

D+29.76th most
Democratic
Most DemocraticMost Republican17th seat · the majority lineDistrict 3

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.

2024
U.S. SenateD+32.7

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 3.

Adults with a bachelor's degree19% 3rd pct · 32nd of 33 in WI

Lower than 97% of seats.

White adults without a degree29% 6th pct · 31st of 33 in WI

Lower than 94% of seats.

Hispanic residents52% 100th pct · 1st of 33 in WI

Highest of 33 seats.

Black residents8% 88th pct · 5th of 33 in WI

Higher than 88% of seats.

Asian residents5% 91st pct · 4th of 33 in WI

Higher than 91% of seats.

People per square mile6,972 97th pct · 2nd of 33 in WI

Denser than 97% 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. 1 of the 4 flipped this year.

District 22
29% college gradsD+8.4Not up in 2026District 21
34% college gradsD+1.4Flipped DDistrict 30
31% college gradsD+3.6Not up in 2026District 7
44% college gradsD+29.5Held 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 2024.

  1. Tim Carpenter (D)
    2027– · Won 2026 unopposed

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