Columbia Square is one of the 22 squares of Savannah, Georgia, United States. It is located in the second row of the city's five rows of squares, on Habersham Street and East President Street. It is south of Warren Square and between Oglethorpe Square to the west and Greene Square to the east. The oldest building on the square is at 307 East President Street, today's 17 Hundred 90 Inn, which, as its name suggests, dates to the 18th century.

The square was laid out in 1799 and is named for Columbia, the poetic personification of the United States. In the center of the square is a fountain that formerly stood at the Wormsloe estate of Noble Jones, one of Georgia's first settlers. It was moved to Columbia Square in 1970 to honor Augusta and Wymberly DeRenne, descendants of Jones. It is sometimes called the "rustic fountain," as it is decorated with vines, leaves, flowers, and other woodland motifs.

Irish immigrant William Kehoe built a house on the eastern side of the square, at 130 Habersham Street, in 1885. After both his business and his family expanded, he built a larger home, completed in 1892, diagonally across the square at 123 Habersham Street.

The Timothy Bonticou Double House, at 418–420 East State Street, was moved one block south from 419–421 East Broughton Lane in 1972.