New Amsterdam, IN has a population of 16 and is the 28,851st largest city in the United States. The population density is 199 per sq mi which is 11% higher than the Indiana average and 120% higher than the national average. The median age in New Amsterdam is 70 which is approximately 88% higher than the Indiana average of 37. In New Amsterdam, 93% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 44% of New Amsterdam residents were born in Indiana, 56% were born out of state, 0% were born outside of the United States and 0% were foreign born.