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.

Hartford County is a county located in the north central part of the U.S. state of Connecticut. According to the 2020 census, the population was 899,498, making it the second-most populous county in Connecticut. Hartford County contains the city of Hartford, the state capital of Connecticut and the county's most populous city, with 121,054 residents at the 2020 census. Hartford County is included in the Hartford-East Hartford-Middletown metropolitan statistical area.