Falmouth, MA has a population of 3,730 and is the 7,764th largest city in the United States. The population density is 1,791 per sq mi which is 184% higher than the Massachusetts average and 1876% higher than the national average. The median age in Falmouth is 61 which is approximately 55% higher than the Massachusetts average of 39. In Falmouth, 56% of the population over 15 years of age are married, 91% speak English and 1% speak Spanish. 55% of Falmouth residents were born in Massachusetts, 27% were born out of state, 1% were born outside of the United States and 17% were foreign born.