The 2008–09 network late night television schedule for the four major English-language commercial broadcast networks in the United States cover the late night hours from September 2008 to August 2009.
The schedule is followed by a list per network of returning series, new series, and series canceled after the 2007-08 television season.
Note: The Tonight Show with Jay Leno ended its first run on May 29, 2009, with The Tonight Show with Conan O'Brien premiering on June 1, 2009.
Note: Late Night with Conan O'Brien ended on February 20, 2009, with Late Night with Jimmy Fallon premiering on March 2, 2009.
TV Listings - New York Times TV Listings