Ohio / OH-01
Ohio District 1
Score
Irregularity score 86 Very irregularLess compact than 90% of other congressional districts.
43rd least compact of 429 nationally, 2nd of 15 in Ohio.
A score describes shape, not intent. Coastlines, rivers and the Voting Rights Act can all make a district irregular. How scores work
The three measures
- Polsby-Popper
- 0.15at least as compact as 21% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
- Reock
- 0.29at least as compact as 9% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
- Convex hull
- 0.62at least as compact as 11% of districts on this measure
Area compared with a rubber band stretched around the district, counting only land. Low for bites and tentacles.
Each measure runs from 0 to 1, where 1 is a perfect circle or a shape with no dents.
The state's edge
17% of this district's border is the state's edge: a coastline, a national border or a state line. Mapmakers don't choose those lines. A ragged one, like a coastline or a river, lowers Polsby-Popper. Reock and convex hull count only the state's own land, so water and neighboring states don't count against them. More on the state's edge
New lines for 2026
Ohio used a different map in the 2026 election than in 2024: the 2025 Ohio Redistricting Commission plan. Source: Ohio Secretary of State (Directive 2025-55)
Cities and towns
The largest places with people in this district, from the 2020 Census. A place split between districts shows how many of its residents live in this one.
- Cincinnati city309,118 of its 309,317 residents
- Mason cityall 34,792 residents
- Lebanon cityall 20,841 residents
- Norwood cityall 19,043 residents
- Springboro city17,871 of its 19,062 residents
- Wilmington cityall 12,664 residents
- Harrison cityall 12,563 residents
- Franklin cityall 11,690 residents
- Mack community11,081 of its 11,088 residents
- Loveland city10,739 of its 13,307 residents
And 60 smaller places. 23% of this district's people live outside any city, town or named community. How places are counted
2024 presidential vote
Ohio drew new lines for 2026, and no 2024 results have been published for them. Where the votes come from
U.S. House
Greg Landsman, Democrat
Elected November 3, 2026, takes office January 3, 2027.
Unofficial results from the Ohio Secretary of State, checked November 6, 2026. A race shows a winner once news decision desks have called it. Results become official when the state certifies them. Where this comes from
Ohio's senators
- Jon Husted, RepublicanSeat on the November 3, 2026 ballot: Sherrod Brown, Democrat, won and takes office January 3, 2027.
- Bernie Moreno, 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
Where it sits in Ohio
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)