Rockville is a census-designated place and a village of the town of Vernon in Tolland County, Connecticut, United States. The village is part of the Capitol Planning Region. The population was 7,920 at the 2020 census. Incorporated as a city in 1889, it has been consolidated with the town of Vernon since 1965.

Vernon is the most populous town in Tolland County, Connecticut, United States. The town is part of the Capitol Planning Region. The population was 30,215 at the 2020 census. Vernon contains the smaller villages of Talcottville and Dobsonville. Vernon contains the former City of Rockville.