Arizona
9 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
2021 Independent Redistricting Commission congressional map
- Drawn by
- a redistricting commission
- Enacted
- 2021-12-22
- Changed since 2024
- No
Source: Arizona Independent Redistricting Commission (checked 2026-11-04)
Districts
| District | Irregularity | National rank |
|---|---|---|
| AZ-01 | Irregularity score 35 Compact | 299th least compact |
| AZ-02 | Irregularity score 20 Compact | 369th least compact |
| AZ-03 | Irregularity score 30 Compact | 325th least compact |
| AZ-04 | Irregularity score 80 Very irregular | 63rd least compact |
| AZ-05 | Irregularity score 42 Middle of the pack | 251st least compact |
| AZ-06 | Irregularity score 58 Middle of the pack | 162nd least compact |
| AZ-07 | Irregularity score 78 Irregular | 73rd least compact |
| AZ-08 | Irregularity score 42 Middle of the pack | 253rd least compact |
| AZ-09 | Irregularity score 69 Irregular | 113th least compact |
Scores describe shape, not intent. How scores work
Arizona's senators
- Ruben Gallego, Democrat
- Mark Kelly, 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 47.2% of the two-party vote and carried 3 of 9 districts.
- Efficiency gap
- 19.6% 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
- 0.6 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
- 0.25 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