
Harwich
- County:
- Barnstable County
- County Seat:
- No
- Area (mi²):
- 20.884
- State:
- Massachusetts
Harwich is located in Barnstable County, Massachusetts. Harwich has a 2025 population of 13,523. Harwich is currently declining at a rate of -0.27% annually but its population has increased by 0.71% since the most recent census, which recorded a population of 13,428 in 2020.
The average household income in Harwich is $123,447 with a poverty rate of 4.49%. The median age in Harwich is 58.8 years: 55.1 years for males, and 60.6 years for females.