George Leighton Dahl (May 11, 1894 – July 18, 1987) was a prominent American architect based in Dallas, Texas during the 20th century. His most notable contributions include the Art Deco structures of Fair Park while he oversaw planning and construction of the 1936 Texas Centennial Exposition. In 1970, in anticipation of imminent commercial growth brought on by the impending development of the Dallas/Fort Worth International Airport, he designed the First National Bank of Grapevine building at 1400 South Main Street. This iconic cubist structure served as a harbinger of the area's upcoming economic development.