
Monument Beach
- County:
- Barnstable County
- County Seat:
- No
- Area (mi²):
- 2.582
- State:
- Massachusetts
Monument Beach is a CDP located in Barnstable County, Massachusetts. Monument Beach has a 2025 population of 3,082. Monument Beach is currently growing at a rate of 0.62% annually but its population has decreased by -2.87% since the most recent census, which recorded a population of 3,173 in 2020.
The average household income in Monument Beach is $113,403 with a poverty rate of 3.13%. The median age in Monument Beach is 46.9 years: 31.8 years for males, and 51.1 years for females.