The Salmon River State Forest is a state park and forest in Colchester, Connecticut. It features the Salmon River, noted for being one of the largest streams and watersheds in the area with sources and mouth entirely located within the bounds of the state of Connecticut.

Established in the 1930s, the Salmon River State Forest features 6000 acres of area. It is home to the Comstock?s Bridge, which is the last surviving covered bridge in the state?s eastern region. It also contains the Airline State Park, which is an old rail trail, and the site where the first sawmill was built in Marlborough in 1751.

The Salmon River State Forest is also noted for its connection with John Carrier, who is believed to be the executioner of Charles the First, who escaped England and moved to the United States during the early days of the European settlement in the country.