New London, IA has a population of 1,945 and is the 11,183rd largest city in the United States. The population density is 1,932 per sq mi which is 3437% higher than the Iowa average and 2033% higher than the national average. The median age in New London is 42 which is approximately 9% higher than the Iowa average of 38. In New London, 58% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 79% of New London residents were born in Iowa, 18% were born out of state, 1% were born outside of the United States and 2% were foreign born.