Connecticut
5 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.
Map used in 2026
2022 court-ordered special master plan
- Drawn by
- a court
- Enacted
- 2022-02-10
- Changed since 2024
- No
Source: Connecticut General Assembly (Reapportionment Commission page) (checked 2026-11-04)
Districts
| District | Irregularity | National rank |
|---|---|---|
| CT-01 | Irregularity score 70 Irregular | 106th least compact |
| CT-02 | Irregularity score 15 Very compact | 392nd least compact |
| CT-03 | Irregularity score 49 Middle of the pack | 211th least compact |
| CT-04 | Irregularity score 48 Middle of the pack | 220th least compact |
| CT-05 | Irregularity score 43 Middle of the pack | 247th least compact |
Scores describe shape, not intent. How scores work
Connecticut's senators
- Richard Blumenthal, Democrat
- Christopher Murphy, Democrat
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 57.4% of the two-party vote and carried all 5 districts.
When one party carries every district, the efficiency gap is large however the lines are drawn, since every vote for the other party counts as wasted. Declination needs districts won by both parties, so it can't be measured here.
- Efficiency gap
- 35.2% Favors Democrats
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
- 0.3 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
- Not measurable
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