South Norwalk is a neighborhood in Norwalk, Connecticut which corresponds to the city's Second Taxing District. Often referred to as SoNo, the neighborhood was originally settled as Old Well, then chartered as the city of South Norwalk on August 18, 1870. The cities of Norwalk and South Norwalk were incorporated on June 6, 1913. South Norwalk underwent major redevelopment during the early 21st century, with many new apartments being constructed, often in close proximity to South Norwalk station, and generally more expensive than existing housing.

Norwalk is a city located in Western Connecticut, United States, in southern Fairfield County, on the northern shore of the Long Island Sound. Norwalk lies within both the New York metropolitan area and the Bridgeport metropolitan area.