Allen Grove is a plantation house and historic district located in Old Spring Hill, Alabama. The Greek Revival house was built for John Gray Allen in 1857 by David Rudisill. It is a two-story frame structure with a two-story front portico featuring square paneled columns. The roof is hipped with side dormers. In 1890 the rear facade was altered when a kitchen and pantry wing and a two-story back porch was added. The house and two other plantation buildings were added to the National Register of Historic Places on July 7, 1994 as a part of the Plantation Houses of the Alabama Canebrake and Their Associated Outbuildings Multiple Property Submission.