Griswold is a town in New London County, Connecticut, United States. The population was 11,951 at the 2010 census. Griswold contains one borough, Jewett City, and also contains the villages of Doaneville, Rixtown, Glasgo, Hopeville, and Pachaug. The town was named after Governor Roger Griswold. According to the United States Census Bureau, the town has a total area of 37.1 square miles (96.0km2), of which 34.7 square miles (89.9km2) is land and 2.4 square miles (6.1km2), or 6.37%, is water.