Marshfield Hills, MA has a population of 2,512 and is the 9,821st largest city in the United States. The population density is 548 per sq mi which is 13% lower than the Massachusetts average and 505% higher than the national average. The median age in Marshfield Hills is 47 which is approximately 18% higher than the Massachusetts average of 39. In Marshfield Hills, 66% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 83% of Marshfield Hills residents were born in Massachusetts, 14% were born out of state, 0% were born outside of the United States and 3% were foreign born.