The Pine Grove Historic District encompasses a well-preserved collection of primarily 19th-century farmsteads, located near one another and a local district school building in Avon, Connecticut. Centered around the junction of West Avon and Harris Roads are four 19th-century farmsteads, one dating to the 18th century, and the 1865 Gothic Revival Pine Grove School. The district was listed on the National Register of Historic Places in 1980.