**Franklin Square Historic District ** is a national historic district in Baltimore, Maryland, United States. It is a 19th-century rowhouse neighborhood developed along a strict grid street pattern. A one square block, two and a half acre public park, Franklin Square, is a focal point for the area and the most elaborate rowhousing surrounds the square. The district contains approximately 1,300 buildings of which approximately 1,250 contribute to the significance of the historic district. It was added to the National Register of Historic Places in 1982.