county, southwestern Connecticut, U.S. It is bounded by Long Island Sound to the south, New York state to the west, and the Housatonic River to the east, and it includes several islands in the sound. Most of the county lies in an upland region forested with hardwoods, with only a narrow coastal plain running along the southern edge. Waterways other than the Housatonic are the Saugatuck, Pequonnock, Mill, and Norwalk rivers as well as Saugatuck, Easton, and Hemlock reservoirs and Lake Candlewood. Parklands include Paugussett and Pootatuck state forest reserves and Collis P. Huntington and American Shakespeare Theater state parks.
Learn more about Fairfield with a free trial on Britannica.com.