Withamsville, OH has a population of 7,087 and is the 5,136th largest city in the United States. The population density is 2,266 per sq mi which is 780% higher than the Ohio average and 2401% higher than the national average. The median age in Withamsville is 43 which is approximately 9% higher than the Ohio average of 39. In Withamsville, 58% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 68% of Withamsville residents were born in Ohio, 29% were born out of state, 1% were born outside of the United States and 2% were foreign born.