Cincinnati Oh Population 2024 By Religion. Cincinnati has a 2024 population of 311,595. The exact population of cincinnati, ohio as of september 2024 is estimated at 309,317 residents.

The metro area population of cincinnati in 2023 was 1,775,000, a 0.62% increase. Columbus is a city located in delaware county, fairfield county, franklin county, licking county, madison county, pickaway county, and union county ohio.