Population Demographics
As of 2024 the population of Clinton County, OH is 41,840. The population is expected to shrink to 41,704 by 2029 - a growth rate of -0.07%.
The median age of Clinton County, OH residents is 41.
The diversity index of Clinton County, OH is 20.9, meaning that there is a 21% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.