1999–2000 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 1999 to August 2000. 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.

ABC
Returning series
 * ABC World News Now
 * ABC World News This Morning
 * Nightline
 * Politically Incorrect with Bill Maher

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

Not returning from 1998-99:
 * The Late Late Show with Tom Snyder

Fox
Returning series
 * MADtv

NBC
Returning series
 * Friday Night
 * Late Night with Conan O'Brien
 * Later
 * Saturday Night Live
 * The Tonight Show with Jay Leno

New series
 * Early Today

Not returning from 1998-99:
 * NBC News at Sunrise