The following is the 1965–66 network television schedule for the three major English language commercial broadcast networks in the United States. The schedule covers primetime hours from September 1965 through August 1966. The schedule is followed by a of returning series, new series, and series cancelled after the 1964–65 season. New series are highlighted in bold while endings are highlighted in italics. Each of the 30 highest-rated shows is listed with its rank and rating as determined by Nielsen Media Research.