99chambers

Wisconsin State Assembly seat · lines in effect since 2024

Wisconsin Assembly District 20

A district of about 61,000 people, 34% of adults with a bachelor's degree. It votes D+19.0 relative to the nation for president.

Christine Sinicki (D) · since Nov 3, 1998Next election Nov 7, 2028The 2026 race →

Where it sits among all 99 seats

Every Wisconsin State Assembly 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+19.021st most
Democratic
Most DemocraticMost Republican50th seat · the majority lineDistrict 20

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. SenateD+22.1No race
Wisconsin State AssemblyD+22.2D+37.8

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 99 seats. Small marks are other seats in Wisconsin. The black marker is District 20.

Adults with a bachelor's degree34% 66th pct · 34th of 99 in WI

Higher than 66% of seats.

White adults without a degree54% 39th pct · 61st of 99 in WI

Lower than 61% of seats.

Hispanic residents12% 85th pct · 16th of 99 in WI

Higher than 85% of seats.

Black residents4% 73rd pct · 27th of 99 in WI

Higher than 73% of seats.

Asian residents1% 36th pct · 64th of 99 in WI

Lower than 64% of seats.

People per square mile4,399 89th pct · 12th of 99 in WI

Denser than 89% 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 14
33% college gradsD+10.3Held DDistrict 65
30% college gradsD+7.7Held DDistrict 66
29% college gradsD+10.0Held DDistrict 53
31% college gradsD+4.4Flipped 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. Christine M. Sinicki (D)
    2025– · Won 2024 by 22.2, 2026 by 37.8

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