2003–04 United States network television schedule (late night)

These are the late night schedules for the four United States broadcast networks that offer programming during this time period, from September 2003 to August 2004. All times are Eastern or Pacific. Affiliates will fill non-network schedule with local, syndicated, or paid programming. Affiliates also have the option to preempt or delay network programming at their discretion.

Legend
Light blue indicates Local programming.

Gray indicates encore programming.

Yellow indicates late night talk or variety shows.

Gold indicates network news programming.

Monday-Friday
Note: Craig Kilborn left The Late Late Show at the end of August 2004, with guest hosts taking his place until Craig Ferguson was selected as the permanent host.

ABC
Returning series
 * ABC World News Now
 * ABC World News This Morning
 * Jimmy Kimmel Live!
 * Nightline

Not returning from 2002-03:
 * ABC News Up Close

CBS
Returning series
 * CBS Morning News
 * Late Show with David Letterman
 * The Late Late Show with Craig Kilborn
 * Up to the Minute

Fox
Returning series
 * MADtv

NBC
Returning series
 * Early Today
 * Last Call with Carson Daly
 * Late Night with Conan O'Brien
 * Saturday Night Live
 * The Tonight Show with Jay Leno