The Buckingham Square Historic District is a historic district in Hartford, Connecticut. It was listed on the National Register of Historic Places in 1977 with an area of 8 acre and included 60 contributing buildings. The district is located in the area around Buckingham Square Park. The district boundaries were increased in 1982 to add one more contributing building on an 0.9 acre area. The added building was designed by George Zunner and was built in 1907.