Population of Chillicothe, Ohio as of January 2026. How many people live in Chillicothe today?

The exact population of Chillicothe, Ohio as of January 2026 is estimated at 22,059 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from Chillicothe.

Check out more data on population in Ohio:

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