Celina, OH has a population of 10,349 and is the 3,855th largest city in the United States. The population density is 2,077 per sq mi which is 707% higher than the Ohio average and 2193% higher than the national average. The median age in Celina is 40 which is approximately 2% higher than the Ohio average of 39. In Celina, 59% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 80% of Celina residents were born in Ohio, 18% were born out of state, 1% were born outside of the United States and 1% were foreign born.