Ellington is a town in Tolland County, Connecticut, United States. Ellington was incorporated in May 1786, from East Windsor. The town is part of the Capitol Planning Region. As of the 2020 census, the town population was 16,426.

Tolland County is a county in the northeastern part of the U.S. state of Connecticut. As of the 2020 census, its population was 149,788. It is incorporated into 13 towns and was originally formed on October 13, 1785, from portions of eastern Hartford County and western Windham County.