The Litchfield Hills (also known as the Northwest Hills or Northwest Highlands) are a geographic region of the U.S. state of Connecticut located in the northwestern corner of the state. It is a term that is roughly coterminous with the boundaries of Litchfield County, for which it is named. The geographic region includes two officially designated regions: rural Northwestern Connecticut, and the area associated with the city of Torrington (also known as the Upper Naugatuck River Valley or simply Litchfield Hills). Much of the area makes up the lowermost section of the Berkshire region, and is culturally similar to the rest of western New England.