Alexander S. Clay (September 25, 1853 - November 13, 1910) was a United States Senator from Georgia. Born near Powder Springs, Georgia, he attended the common schools, and graduated from Hiawassee College (Tennessee) in 1875. He was admitted to the bar in 1877 and commenced practice in Marietta, Georgia, serving as a member of the city council in 1880 and 1881. He was a member of the Georgia House of Representatives from 1884 to 1887 and 1889 to 1890, and served as speaker pro tempore in 1886-1887 and 1889-1890. He was a member of the Georgia Senate from 1892 to 1894, serving as its president for two years, and in 1896 was elected as a Democrat to the U.S. Senate. He was reelected twice and served from March 4, 1897 until his death in Atlanta in 1910. While in the Senate, he was chairman of the Committee on Revolutionary Claims (Fifty-ninth Congress) and a member of the Committee on Woman Suffrage (Sixty-first Congress).
Interment was in the City Cemetery, Marietta.