Tariffville is a neighborhood and census-designated place (CDP) in the town of Simsbury in Hartford County, Connecticut, United States. The population was 1,324 at the 2010 census. It is a popular location for whitewater paddlers who use the Farmington River.

Simsbury is a town in Hartford County, Connecticut, United States, incorporated as Connecticut's 21st town in May 1670. The town is part of the Capitol Planning Region. The population was 24,517 in the 2020 census.