Hamilton, IN has a population of 1,564 and is the 12,457th largest city in the United States. The population density is 757 per sq mi which is 322% higher than the Indiana average and 735% higher than the national average. The median age in Hamilton is 43 which is approximately 16% higher than the Indiana average of 37. In Hamilton, 58% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 67% of Hamilton residents were born in Indiana, 32% were born out of state, 0% were born outside of the United States and 1% were foreign born.