Terryville is a census-designated place (CDP) in Litchfield County, Connecticut, United States, and is the largest village within the town of Plymouth.

There is a water wheel located in downtown Terryville that is dedicated to the son of Eli Terry Sr. Terryville is in the eastern part of the town of Plymouth and the southeastern corner of Litchfield County.

U.S. Route 6 passes through the center of Terryville, leading east into Bristol and west into Thomaston.

Male full-time workers had a median income of $58,929 versus $51,667 for females.

A new high school building is located on North Harwinton Avenue in Terryville.

A new high school building was built on North Main Street and was used until January 2008.