Ansonia is a city in New Haven County, Connecticut state. At the 2010 census, its population was estimated to be 19,249. The city is traversed by the Metro North railroad. The Connecticut Transit bus also stops here.
The town is also referred to as "The Copper City," and is recognized for its heavy machine manufacturing industry located in the heart of the lower Naugatuck Valley. Production includes copper, brass, rubber and plastics processing, molding and tubing, iron castings, sheet metal, electric, automatic screw machine, textiles and foundry products. After a slump in the 1980's, the area has seen an economic revival in the recent years.