The area of the city is 89.63 sq mi (232.14 km 2 ) . Boston, Massachusetts is at an elevation of 43 m . 1,770 sq mi (4,600 km 2 ) is the area of the urban region of Boston, Massachusetts . The metro region is 4,500 sq mi (11,700 km 2 ) in area . The land area of the city is 48.42 sq mi (125.41 km 2 ) . The water area of the city is 41.21 sq mi (106.73 km 2 )
232.14 km 2  is the area of Boston, Massachusetts