Alex Birns (February 21, 1907 – March 29, 1975), best known as Shondor Birns, was a notorious Jewish-American mob boss and racketeer from Cleveland, Ohio, who was once labeled as the city's "Public enemy No. 1" by the local newspapers. He was actively involved in a wide variety of racketeering and other organized crime related activities such as prostitution, theft, numbers, etc., from the days of Prohibition until his demise.