Amherst Center, MA has a population of 20,037 and is the 2,175th largest city in the United States. The population density is 4,056 per sq mi which is 544% higher than the Massachusetts average and 4376% higher than the national average. The median age in Amherst Center is 20 which is approximately 48% lower than the Massachusetts average of 39. In Amherst Center, 10% of the population over 15 years of age are married, 85% speak English and 2% speak Spanish. 50% of Amherst Center residents were born in Massachusetts, 38% were born out of state, 2% were born outside of the United States and 11% were foreign born.