Derby Map
Derby is a city in New Haven County, Connecticut, United States. The population was 12,391 at the 2000 census. With 5 square miles (13 km2) of land area, Derby is Connecticut's smallest municipality.
The city has a Metro-North railroad station called Derby – Shelton.
Derby was settled in 1642 as an Indian trading post under the name Paugasset. It was named after Derby, England in 1675.
Nearby cities include Shelton, Ansonia, Bridgeport, East Haven, Naugatuck.