Derby [key]. <1> city (2020 pop. 12,325), New Haven co., SW Conn., at the confluence of the Naugatuck and Housatonic rivers, opposite Shelton; founded 1642 as a trading post, inc. as a city 1893. Its copper industry and pin manufactures originated in the 1830s but were in serious decline by the last third of the 20th century. It was the first town in New England to operate an electric trolley system and the first to manufacture an electric locomotive. It is home to the Shore Line Trolley Musuem. In Nov. 2001, a local citizen died due to an anthrax attact, the last of 5 such incidents that occurred that year. <2> City (2020 pop. 25,413), Sedgwick co., SW Kansas, the largest suburb of Wichita; founded 1871 as El Paso; inc. 1903; name changed to Derby, 1953. From the 1920s through the 1960s, several aircraft manufacturers were located in the town. McConnell Airforce Base is located nearby.
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