Alexander Singer (born 1932, in New York City, New York) is an American director. He began his career behind the camera in 1951 as a cinematographer on the short documentary Day of the Fight, directed by his high school friend, Stanley Kubrick. Singer himself turned to directing a decade later with the film, A Cold Wind in August.

Although he would direct other feature films, such as the Lee Van Cleef western, Captain Apache (1971), and Glass Houses (1972), a film which he also wrote, the bulk of Singer's credits are in television. The long list of series to which Singer has lent his directorial talents include Dr. Kildare, The F.B.I., Mission: Impossible, Alias Smith and Jones, Police Woman, MacGyver, and three Star Trek series: The Next Generation, Deep Space Nine, and Voyager.

Singer married his wife, Judy, in 1950. As of 2008, they are still married.

Went to William Howard Taft High School in the Bronx where he met and became good friends with legendary director Stanley Kubrick.