Rockville is a census-designated place

Census-designated place

A census-designated place is a concentration of population identified by the United States Census Bureau for statistical purposes. CDPs are delineated for each decennial census as the statistical counterparts of incorporated places such as cities, towns and villages...

 and a village of the town of Vernon

Vernon, Connecticut

Vernon is a town in Tolland County, Connecticut, United States. The population was 29,179 at the 2010 census.Vernon was incorporated in October, 1808, from Bolton. Vernon contains the former city of Rockville, incorporated in January, 1889. The town of Vernon and city of Rockville consolidated as a...

 in Tolland County, Connecticut

Tolland County, Connecticut

Tolland County is a county located in the northeastern part of Connecticut. As of 2010, the population was 152,691.Counties in Connecticut have no governmental function: all legal power is vested in the state, city, and town governments...

, United States. The population was 7,708 at the 2000 census. Incorporated as a city in 1889, it has been consolidated with the town of Vernon since 1965.
According to the United States Census Bureau

United States Census Bureau

The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...

, the CDP has a total area of 1.8 square miles (4.7 km²), of which, 1.7 square miles (4.4 km²) of it is land and 0.04 square mile (0.1035995244 km²) of it (1.70%) is water.
In 1726, Samuel Grant traded his farm

Farm

A farm is an area of land, or, for aquaculture, lake, river or sea, including various structures, devoted primarily to the practice of producing and managing food , fibres and, increasingly, fuel. It is the basic production facility in food production. Farms may be owned and operated by a single...

 in Bolton

Bolton, Connecticut

Bolton is a town in Tolland County, Connecticut, United States. The population was 5,017 at the 2000 census. Bolton was incorporated in October 1720 and is governed by town meeting.-History:...

 for 500 acres (2 km²) in the northern part of Bolton

Bolton, Connecticut

Bolton is a town in Tolland County, Connecticut, United States. The population was 5,017 at the 2000 census. Bolton was incorporated in October 1720 and is governed by town meeting.-History:...

.