Griswold has a total area of about 96 sq. kms. and is elevated from the sea level by about 210 ft. Griswold is located in the County of New London. There is also a borough called Jewett City and there are also a number of villages located in the vicinity of the town. Avery House, Timothy Lester Farmstead, House of Edward Cogswell etc. are some of the famous locations nearby and are some important tourist locations.
M.C. Tyler, an author, was a notable resident of the area.