Newington is a town in Hartford County, Connecticut, United States. As of the 2000 census, it had a total population of 29,306. The Connecticut Department of Transportation has its headquarters in Newington. Newington is also home to Mill Pond Falls, the smallest natural waterfall in the country. It is celebrated each fall during the Waterfall Festival. The American Radio Relay League is headquartered in Newington, with a call sign of W1AW.