Louisburg Square is a street in the Beacon Hill neighborhood of Boston, Massachusetts, bisected by a small private park.

The park itself is a small grassy oval surrounded by a wrought-iron fence; there is no public access.

[1] The Greek Revival houses around the square reflect the rarefied privilege enjoyed by the 19th-century upper class in Beacon Hill.

Among the famous people who lived there in the 19th century were Atlantic Monthly editor William Dean Howells, architect Charles Bulfinch, painter John Singleton Copley, and teacher A. Bronson Alcott and his daughter, author Louisa May Alcott (who died there).

Former U.S. Secretary of State John Kerry and his wife Theresa Heinz, own the townhouse at 19 Louisburg Square.