The Litchfield Hills is a region of the state of Connecticut located in the northwestern corner of the state; it is a term that is semi-contiguous with the boundaries of Litchfield County, for which it is named. The area is contained within the Torrington micropolitan area, the most populous such area in the United States.

The Litchfield Hills region is known for its distinct and traditional New England scenery, which can stand in contrast to the rest of Connecticut, which is largely urbanized or suburbanized. Most of the region is comprised of forested hills and rocky peaks, with farmland and small towns interspersed in the valleys and plains. This region is also the focal point for the state's small vineyard and wine industry, as well as a key component of the tourist economy of the state. Many visitors arrive in the autumn to witness the fall foliage, and to visit the region's many covered bridges or waterfalls.

Because of both its rural beauty and its relative proximity to New York City, the area has been and continues to be home to many famous or wealthy residents, including Mia Farrow, Ralph Lauren, Paul Newman, and David Letterman.