George S. Cooper (December 14, 1864 – 1929) was an American architect and builder from Washington, D.C. During his 40-year career, he was responsible for designing around 850 properties, including homes, commercial buildings and apartment buildings, several of which are listed on the National Register of Historic Places (NRHP). The 1903 book History of the City of Washington states: "It may be thought that Mr. Cooper's forte lies in the designing of apartment houses, since the handsomest in the city are a result of his genius..." and "No young man has played a more important part in the active growth and great development of Greater Washington than George S. Cooper..."