The 2009–10 daytime network television schedule for four of the five major English-language commercial broadcast networks in the United States covers the weekday daytime hours from September 2009 to August 2010. The schedule is followed by a list per network of returning series, and any series canceled after the 2008–09 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, PBS Kids – 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 Fox or MyNetworkTV, as the former network and the latter programming service did not offer (and continues not to offer) a daytime network schedule or network news, and Ion Television, as its schedule was composed mainly of paid programming and syndicated reruns at the time.

• New series are highlighted in bold.

• All times correspond to U.S. Eastern and Pacific Time scheduling (except for some live sports or events). Except where affiliates slot certain programs outside their network-dictated timeslots, subtract one hour for Central, Mountain, Alaska, and Hawaii-Aleutian times.
• Local schedules may differ, as affiliates have the option to pre-empt or delay network programs.^[1] Such scheduling may be limited to preemptions caused by local or national breaking news or weather coverage (which may force stations to tape delay certain programs in overnight timeslots or defer them to a co-operated station or digital subchannel in their regular timeslot) and any major sports events scheduled to air in a weekday timeslot (mainly during major holidays). Stations may air shows at other times at their preference.

• 2009–10 United States network television schedule (prime-time)
• 2009–10 United States network television schedule (late night)