Cohassett Beach is a census-designated place (CDP) in Grays Harbor County, Washington, United States.

[6] According to the United States Census Bureau, the CDP has a total area of 1.3 square miles (3.3 km2), all of it land.

Cohassett Beach is a historic part of the community of Westport.

At the turn of the century, Cohassett Beach was a summer artists retreat and a few of the original homes remain however accretion of the beach to the west has altered the "oceanfront" aspect of that neighborhood.

36.8% of all households were made up of individuals, and 16.9% had someone living alone who was 65 years of age or older.