Buzzards Bay is a census-designated place (CDP) in the town of Bourne in Barnstable County, Massachusetts. The population was 3,859 at the 2010 census. It is the most populous of the five CDPs in Bourne.
Buzzards Bay is located at 41°45′5″N 70°36′49″W (41.751364, -70.613563). Along with Bournedale and Sagamore Beach, it is one of three communities in Barnstable County located on the mainland side of the Cape Cod Canal. Excessively drained sand underlies most of the community and the majority is mapped as Carver soil series.
According to the United States Census Bureau, the CDP has a total area of 2.9 square miles (7.6 km2). 1.9 square miles (5.0 km2) of it is land and 1.0 square mile (2.6 km2) of it (34.75%) is water, consisting primarily of Buttermilk Bay, an arm of Buzzards Bay that forms the western edge of the CDP.
As of the census of 2000, there were 3,549 people, 1,216 households, and 795 families residing in the CDP. The population density was 692.1 per km2 (1,793.4 per mi2). There were 1,572 housing units at an average density of 306.5 per km2 (794.4 per mi2). The racial makeup of the CDP was 98.49% White, 0.01% African American, 0.54% Native American, 0.90% Asian, 0.99% from other races, and 0.07% from two or more races. Hispanic or Latino of any race were 0.04% of the population.