The Horseneck Beach State Reservation is a state beach and recreational facility located in Westport, Massachusetts. This coastal area and surrounding recreational facilities are operated and managed by the Massachusetts Department of Conservation and Recreation.

Horseneck Beach State Reservation is located on an oddly-shaped peninsula on the coast of Westport. It is composed of 600 acres of beach, marshlands, estuaries, and protected areas. A popular beach located in the park is called Horseneck beach and it is one of the most popular recreational areas in the Massachusetts State Parks and Forests system. The geology of the park that features rich estuaries and marshlands attract many migrating and native bird species which make the park one the best bird watching locations in the state.