Wisconsin
8 congressional districts.
Map
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)
Select a district for details.
The area outlined with dashes on the map, enlarged so its smaller districts can be seen.
Map used in 2026
2022 court-adopted map (Gov. Evers' plan selected in Johnson v. WEC)
- Drawn by
- a court
- Enacted
- 2022-03-03
- Changed since 2024
- No
Source: Justia (Wisconsin Supreme Court opinion) (secondary host) (checked 2026-11-04)
Districts
| District | Irregularity | National rank |
|---|---|---|
| WI-01 | Irregularity score 36 Compact | 296th least compact |
| WI-02 | Irregularity score 15 Very compact | 393rd least compact |
| WI-03 | Irregularity score 64 Irregular | 138th least compact |
| WI-04 | Irregularity score 23 Compact | 354th least compact |
| WI-05 | Irregularity score 19 Very compact | 372nd least compact |
| WI-06 | Irregularity score 57 Middle of the pack | 171st least compact |
| WI-07 | Irregularity score 39 Compact | 274th least compact |
| WI-08 | Irregularity score 38 Compact | 279th least compact |
Scores describe shape, not intent. How scores work
Wisconsin's senators
- Tammy Baldwin, Democrat
- Ron Johnson, Republican
Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from
Partisan fairness
How the 2024 presidential vote splits across these districts. Kamala Harris (Democrat) won 49.6% of the two-party vote and carried 2 of 8 districts.
- Efficiency gap
- 25.4% Favors Republicans
Counts each party's wasted votes: votes for a losing candidate, plus a winner's votes beyond the half needed to win. The gap is the difference between the two parties' wasted votes, as a share of all votes.
- Mean-median difference
- 6.2 points Favors Republicans
The gap between a party's average vote share across the districts and its share in the middle (median) district. When the middle district leans away from a party's average, that party's voters are packed into a few lopsided districts.
- Declination
- 0.56 Favors Republicans
Compares how lopsided each party's wins are. A party that wins a few districts by huge margins and loses the rest narrowly is at a disadvantage. Runs from 0 (even) to 1.
Votes are 2024 presidential results by precinct, added up within each district. This state used the same districts in 2024 and 2026. These measures show how a map turns one election's votes into seats. They don't show why the lines were drawn, and they shift from one election to the next. How fairness scores work