Amelia, OH has a population of 5,132 and is the 6,347th largest city in the United States. The population density is 2,864 per sq mi which is 1012% higher than the Ohio average and 3061% higher than the national average. The median age in Amelia is 32 which is approximately 18% lower than the Ohio average of 39. In Amelia, 61% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 74% of Amelia residents were born in Ohio, 23% were born out of state, 0% were born outside of the United States and 3% were foreign born.