SOUTH NORWALK, a city of Fairfield county, Connecticut, U.S.A., at the mouth of the Norwalk river, on Long Island Sound, in the township of Norwalk, and 42 m. by rail N.E. of New York. Pop. (1900) 6591, including 1528 foreign-born (many Hungarians) and 83 negroes; (1910) 8968. It is served by the main line and the Danbury division (of which it is a terminus) of the New York, New Haven & Hartford railway, by inter-urban electric lines, and by steamboats to New York. The business and manufacturing section is close to the river and only a few feet above it; behind this, along a ridge, is the residential district; along the Sound are summer cottages and pleasure resorts. West Avenue is a finely shaded drive. The city has a public library and a soldiers' monument. South Norwalk is chiefly a manufacturing and commercial city. It has a good harbour (in which there are three lighthouses), considerable coastwise trade, and important oyster fisheries. South Norwalk, long an unincorporated village called Old Well, was chartered as a city under its present name in 1870, and its charter was revised and amended in 1882, 1897 and 1909.