Union Hill is a historic district of Richmond, Virginia. According to the Richmond Times Dispatch, the neighborhood "generally is bordered on the south by East Marshall Street and Jefferson Avenue, on the west by Mosby Street, on the north by O and Carrington streets, and angled on the east by North 25th Street." The neighborhood is on the Virginia Landmarks Register and the National Register of Historic Places, and is also one of sixteen designated "Old and Historic Districts" in Richmond.