Rockville is a census-designated place and a village of the town of Vernon in Tolland County, Connecticut, United States. The population was 7,474 at the 2010 census. Incorporated as a city in 1889, it has been consolidated like the town of Vernon in the past 1965.

According to the United States Census Bureau, the CDP has a total area of 1.8 square miles (4.7 km), of which 1.7 square miles (4.4 km²) is home and 0.04 square miles (0.10 km) (1.70%) is water.

In 1726, Samuel Grant traded his farm in Bolton for 500 acres (2.0 km) in the northern allocation of Bolton. This included the Place which is now known as “Rockville” and for just about the neighboring century it was a unnamed village. A prominent feature of the area is the Shenipsit Lake, or “The Snip” as it is currently dotingly called by the residents. The Snip feeds the Hockanum River which cascades 254 feet greater than 1.5 miles (2.4 km). The river was used by the farmers for a grist mill, a saying mill, an oil mill and even a distillery starting c. 1740.

In 1821, Colonel Francis McLean built the first textile mill in what is now Rockville in partnership gone George and Allyn Kellogg and Ralph Talcott, next to a spot known as “the Rock” with capital of $16,000. Francis McLean had connected previously taking into consideration some others in the Warburton Mill in Talcottville. “The Rock” was a natural dam of solid rock that made a tall falls upon the Hockanum River. In what is now the center of Rockville, he dammed happening the Hockanum River and built a water-powered mill known as the “Rock Mill”, which was possibly otherwise known as the McLean Woolen Factory. By 1823 his mill was in full operation. The other mill was 80 by 30 feet, and its product was blue and blue-mix satinet. In 1826 capacity looms were introduced.