Colony Square is a mixed-use development and sub-district in Midtown Atlanta, Georgia, located on Peachtree Street in between 14th and 15th Streets. The oldest high-rise development in Midtown, the sub-district was built between 1969 and 1975, with Henri Jova of Jova/Daniels/Busby serving as principal architect. It was the first mixed-use development in the Southeast.
Designed in modernist style, Colony Square comprises three skyscrapers, two containing offices (Colony Square 100 and Colony Square 400) and one housing a hotel, the W Atlanta-Midtown. The three skyscrapers are connected by Colony Square Mall, located beneath a sky-lit atrium and offering a food court, retail, and an athletic club. Also within the sub-district are three mid-rise condominium buildings (two comprise Colony House and the third, Hanover House). Colony Square also contains street-level restaurants, including 5Church Atlanta, Establishment, Chick-fil-a and Starbucks. 
North American Properties agreed to terms with Tishman Speyer to purchase the property for $164.5 million in Q4 2015. The deal will include the retail and office space, but not the condominiums and hotel that are part of the complex. North American Properties has major renovation plans for the retail component. The new owner plans to reconfigure the shop space in order to allow shoppers to stroll freely through a courtyard that faces the main street. These plans are scheduled to be completed by July 2018.
- 100 Colony Square, 1175 Peachtree Street NE, 314.96 feet (96.00 m), 24 floors, opened 1970
- 400 Colony Square, 1201 Peachtree Street NE, 308 feet (94 m), 22 floors, opened 1975
- W Atlanta-Midtown, 188 14th Street NE, 310 feet (94 m), 28 floors, opened 1974
- Hanover House, 147 15th Street, NE
- 100 Colony House, 145 15th Street, NE, 14 floors
The Consulate-General of Canada is located in 100 Colony Square Building (Suite 1700), as is the Netherlands Foreign Investment Agency (Suite 1206). WebMD has regional offices located on the top two floors of Colony Square 400. The complex is also home to the broadcast studios of the CBS Radio Atlanta stations of WVEE, WZGC, and WAOK.
In 1995 the Consulate-General of Japan in Atlanta was located in Colony Square. In 2002 the consulate announced it was moving from Colony Square to One Alliance Center. The consulate had over three years left in the lease of Colony Square. Because TrizecHahn Office Properties Inc. owned both office properties, the consulate was easily able to move to its new location.
- Saporta, Maria (January 27, 2014), "Atlanta architect, Midtown savior Henri Jova dies", Atlanta Business Chronicle
- "Office Space In Colony Square - Regus US". www.regus.com.
- "Archived copy". Archived from the original on 2011-10-29. Retrieved 2011-05-24.CS1 maint: Archived copy as title (link)
- GmbH, Emporis. "EMPORIS". www.emporis.com.
- Pleven, Liam. "Cincinnati and Houston Developers Make Atlanta Mall Bet". Wall Street Journal. ISSN 0099-9660. Retrieved 2015-12-07.
- GmbH, Emporis. "100 Colony Square, Atlanta - 121096 - EMPORIS". www.emporis.com.
- GmbH, Emporis. "400 Colony Square, Atlanta - 121209 - EMPORIS". www.emporis.com.
- GmbH, Emporis. "W Atlanta-Midtown, Atlanta - 121104 - EMPORIS". www.emporis.com.
- "Contact Us." Consulate-General of Canada in Atlanta. Retrieved on July 28, 2009. "1175 Peachtree Street, N.E. 100 Colony Square, Suite 1700 Atlanta, GA 30361-6205"
- "Contact North America." Netherlands Foreign Investment Agency. Retrieved on May 23, 2013. "Atlanta Office 1175 Peachtree Street NE 100 Colony Square, Suite 1206 Atlanta, GA 30361"
- Greer, Richard. "Unionists protest at Japanese consulate." The Atlanta Journal and Constitution. Friday June 23, 1995. Business p. 3H.
- Gove, Matt. "Japanese Consulate says goodbye to Colony Square." Atlanta Business Journal. March 4, 2002. Retrieved on May 21, 2013.