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

As of the census[6] of 2000, there were 2,570 people, 1,279 households, and 698 families residing in the CDP.

There were 1,279 households, out of which 13.0% had children under the age of 18 living with them, 44.0% were married couples living together, 7.3% had a female householder with no husband present, and 45.4% were non-families.

38.5% of all households were made up of individuals, and 20.6% had someone living alone who was 65 years of age or older.

Males had a median income of $37,266 versus $29,625 for females.