New Hampton, IA has a population of 3,478 and is the 8,073rd largest city in the United States. The population density is 1,100 per sq mi which is 1913% higher than the Iowa average and 1114% higher than the national average. The median age in New Hampton is 44 which is approximately 17% higher than the Iowa average of 38. In New Hampton, 64% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 81% of New Hampton residents were born in Iowa, 17% were born out of state, 0% were born outside of the United States and 2% were foreign born.