Tom Trout
— Police Officer Dennis Nordell
Richard Gaines
— Police Inspector Dana
Anthony Caruso
— Frankie
Hugh Beaumont
— Police Academy Graduate (uncredited)
William Challee
— Snorky (uncredited)
Roger Moore
— Police Instructor (uncredited)
Robert Emmett O'Connor
— Veteran Policeman McGuinnes (uncredited)
Arthur Space
— Calvin 'Whitey' Foster (uncredited)
Harry Strang
— Police Captain R.C. Johnson (uncredited)
William Tannen
— Police Lab Technician Wilson (uncredited)
Ray Teal
— Police Lt. O'Neill (uncredited)
Charles C. Wilson
— Chief of Police (uncredited)
Harry Wilson
— Ex-Con Thug (uncredited)