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.

Ohio is the seventh most populous U.S. state, with a 2023 population of 11,785,935, according to U.S. Census data. This is an increase from 11,759,697 in 2022 and 11,765,227 in 2021, but still ...