1874) in Boston, Massachusetts, is a square located in the financial district at the intersection of Milk, Congress, Pearl and Water Streets.

It features a café, fountains, and a pergola around a central lawn, and the management provides seat cushions for visitors during the summer.

The Great Boston fire of 1872 swept through the area, and as rebuilding began the area began to be called Post Office Square after the new United States Post Office and Sub-Treasury Building which faced the square.

[8] In 1874, the headquarters of the New England Mutual Life Insurance Company, designed by Nathaniel Bradlee, was erected in the square on the site of what is now Norman B. Leventhal Park.

An electric company worker was killed but it was after normal business hours and the building was able to be evacuated with only a few injuries.