Monument Beach is a census-designated place (CDP) in the town of Bourne in Barnstable County, Massachusetts, United States.

[3] Monument Beach is located near the center of the town of Bourne.

[4] It is situated between Buzzards Bay to the west and Massachusetts Route 28 to the east.

[5] As of the census[7] of 2000, there were 2,438 people, 1,023 households, and 694 families residing in the CDP.

25.6% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older.