Clay Center, OH has a population of 337 and is the 21,836th largest city in the United States. The population density is 325 per sq mi which is 26% higher than the Ohio average and 259% higher than the national average. The median age in Clay Center is 39 which is approximately 1% lower than the Ohio average of 39. In Clay Center, 66% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 91% of Clay Center residents were born in Ohio, 9% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Clay Center is 26% higher than Ohio.
The median age in Clay Center is 1% lower than Ohio.
In Clay Center 100.00% of the population is White.
In Clay Center 0.00% of the population is Black or African American.