The 1999–2000 daytime network television schedule for the six major English-language commercial broadcast networks in the United States in operation during that television season covers the weekday daytime hours from September 1999 to August 2000.
The schedule is followed by a list per network of returning series, new series, and series canceled after the 1998–99 season.
Affiliates fill time periods not occupied by network programs with local or syndicated programming.
PBS – which offers daytime programming through a children's program block, which the service rebranded as PBS Kids on September 6 – is not included, as its member television stations have local flexibility over most of their schedules and broadcast times for network shows may vary.
Also not included are stations affiliated with Pax TV; although Pax carried a limited schedule of first-run programs, its schedule otherwise was composed mainly of syndicated reruns.