Today, much of the old village area is part of a town historic district, first established in 1967, where buildings from three centuries are protected for future generations. The boundaries of the town historic district are the railroad on the north; the Mill River and Southport Harbor on the south; Church Street; and Old South Road and Rose Hill Road on the west and east, respectively, including all properties on both sides of the roads. Strict historic zoning regulations apply in the district and have been upheld by the Connecticut Supreme Court. The Southport Historic District is also listed on the National Register of Historic Places.