Ohio's constitution gives a map passed without bipartisan support a short life: four years instead of ten. The 2022 map was one of those, so the state had to redraw before 2026. On 31 October 2025 the seven-member Ohio Redistricting Commission approved a new congressional map unanimously, which means it lasts through 2031.
How the map does it
On paper the map favours Republicans in 12 of 15 seats, up from the 10 they hold, with a 13th within reach; Democrats are capped at four, perhaps five. The gains come from the usual place: the Democratic vote in Ohio's cities is spread across districts anchored in Republican suburbs and countryside.
Why it matters
Ohio shows the quieter version of the redistricting war: no special session, no Supreme Court, a bipartisan vote on a commission, and still two or three seats moving. Analysts name Ohio alongside Texas as a battleground for House control precisely because its seats move without drama.
Try it yourself
Columbus is a Democratic city in a Republican state, the exact shape the Ohio map exploits. Wall the city in, then slice it.