William A. Rowan (November 24, 1882 – May 31, 1961) of Chicago was an American politician who served as a U.S. Representative from Illinois from 1943 to 1947.

William A. Rowan served as alderman of the Tenth Ward of Chicago from 1927 to 1942, and also as an Illinois Representative to The Seventy-Eighth and Seventy-Ninth U.S.

He was appointed United States Comptroller of Customs at Chicago, on January 21, 1947, in which capacity he served until 1953.

While in office, he championed legislation aimed at improving the health, welfare, education, and recreational areas for children; a park serving East Side Chicago is dedicated in his honor.

[2] Rowan was married to Mary Isabel Dunne, together they raised 5 children: Miriam, Richard, Patricia, and William Jr.[1] He was interred in Holy Sepulchre Cemetery, Worth, Illinois.