Harwich Center, MA has a population of 1,423 and is the 13,005th largest city in the United States. The population density is 633 per sq mi which is equal to the Massachusetts average and 598% higher than the national average. The median age in Harwich Center is 51 which is approximately 29% higher than the Massachusetts average of 39. In Harwich Center, 57% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 62% of Harwich Center residents were born in Massachusetts, 34% were born out of state, 1% were born outside of the United States and 3% were foreign born.