The 2008–09 daytime network television schedule for the four major English-language commercial broadcast networks in the United States covers the weekday and weekend afternoon hours from September 2008 to August 2009. The schedule is followed by a list per network of returning and cancelled shows from the 2007–08 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 MyNetworkTV (as the programming service doesn't offer daytime programs of any kind), and Ion Television (as its schedule is composed mainly of syndicated reruns). Fox is not included on the weekday schedule: Fox only airs daytime programming (in the form of sports on weekend afternoons).

• New series are highlighted in bold.
• All times correspond to U.S. Eastern and Pacific Time (select shows) 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, Pacific (for selected shows), Alaska, and Hawaii-Aleutian times.
• Local schedules may differ, as affiliates have the option to pre-empt or delay network programs. 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.
• All sporting events air live in all time zones in U.S. Eastern time, with local and/or primetime programming after game completion.

• Guiding Light— Canceled after 72 seasons (57 years on television and 19 years on radio, with simultaneous radio and television broadcasts from 1952 to 1956) on April 1, 2009; the series concluded its CBS run on September 18, 2009.^[1]

• 2008-09 United States network television schedule (morning)
• 2008–09 United States network television schedule (prime-time)
• 2008–09 United States network television schedule (late night)

• Curt Alliaume. "ABC Daytime Schedule". Curt Alliaume’s Utterly Irrelevant Web Site. Archived from the original on October 15, 2007.
• Curt Alliaume. "CBS Daytime Schedule". Curt Alliaume’s Utterly Irrelevant Web Site. Archived from the original on October 15, 2007.
• Curt Alliaume. "NBC Daytime Schedule". Curt Alliaume’s Utterly Irrelevant Web Site. Archived from the original on October 12, 2007.