Senate Republicans said in a press release that the new map offers seven competitive districts, divides only 12 counties and keeps seven of Ohio's eight biggest cities whole.

Union County had the greatest increase in population, growing by 10.4 percent from 63,085 to 69,637 between 2020 and 2023. ... Ohio: Map Reveals Counties Where Population Is Shifting Most.

Under the new rules, 65 of Ohio's 88 counties cannot be split for congressional maps. Another 18 counties can be divided once and five counties can be divided twice. That is the maximum, though.