Chatham Square is one of the 22 squares of Savannah, Georgia, United States. It is located in the southernmost row of the city's five rows of squares, on Barnard Street and West Wayne Street, and was laid out in 1847. It is south of Pulaski Square and west of Monterey Square in the southwestern corner of the city's grid of squares. The square is named for William Pitt, 1st Earl of Chatham. Although Pitt never visited Savannah, he was an early supporter of the Georgia colony, and both Chatham Square and Chatham County are named in his honor. The oldest building on the square is the Enoch Hendry Row House, at 108–112 West Taylor Street, which dates to 1851.

Chatham Square is sometimes known locally as Barnard Square, in reference to the 1901-built Barnard Street School (which actually stands at 212 West Taylor Street) and has served as a building for the Savannah College of Art and Design since 1988. The college renamed it Pepe Hall.

The square contains a sundial dedicated to African-American politician Louis Burke Toomer in 1964.

Namesake	Image	Note
William Pitt, 1st Earl of Chatham		The square is named for William Pitt, 1st Earl of Chatham.

Gordon Row comprises the fifteen homes from 101 to 129 West Gordon Street, and was completed in 1854.

One of two Quantock Rows in the city, this one comprises the six homes between 114 and 124 West Taylor Street.

Each building below is in one of the eight blocks around the square composed of four residential "tything" blocks and four civic ("trust") blocks, now known as the Oglethorpe Plan. They are listed with construction years where known.

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  William Kine Property, 419–425 Barnard Street
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  Quantock Row, 114–124 West Taylor Street
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  Edward Lovell Duplex, 126–128 West Taylor Street
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  William Bradley House, 424 Barnard Street
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  William Bradley Commercial Property, 426 Barnard Street
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  Meinhardt Row, 101–107 West Taylor Street
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  Enoch Hendry Row House, 108–112 West Taylor Street
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  Frederick Kuck Property, 411–417 Whitaker Street
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  Gordon Row, 101–129 West Gordon Street, in the mid-20th century. Viewed from Whitaker Street, looking west
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  Thomas McArthur Duplex, 205–207 West Gordon Street
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  Matilda Heitman Properties, 209–213 West Gordon Street
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  Dasher Row, 433–441 Barnard Street
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  Barnard Street School, 212 West Taylor Street, as it looked around 1915