Lower Naugatuck Valley

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The Lower Naugatuck Valley, also known locally as simply "The Valley", is a geographic area located around the confluence of the southern parts of the Housatonic and Naugatuck Rivers. It consists of the municipalities of Seymour, Derby, Ansonia, and outside the Naugatuck watershed, Shelton, which constitute the Valley Council of Governments. The scope of the Lower Naugatuck Valley is also sometimes extended to encompass the next three towns upstream and to the north, which are Beacon Falls, Naugatuck, and Oxford, Connecticut.

During the 19th and 20th centuries, the Valley was one of the main manufacturing centers in New England, and most of the Valley communities were emblematic New England mill towns.

In 2000, the seven towns in the extended Lower Naugatuck Valley region were selected as an All-America City, varying the title of that award as "All-America Valley".