1998–99 United States network television schedule

The following is the 1998–99 network television schedule for the six major English language commercial broadcast networks in the United States. The schedule covers primetime hours from September 1998 through August 1999. The schedule is followed by a list per network of returning series, new series, and series cancelled after the 1997–98 season. All times are Eastern and Pacific, with certain exceptions, such as Monday Night Football.

New series highlighted in bold.

Each of the 30 highest-rated shows is listed with its rank and rating as determined by Nielsen Media Research.

Yellow indicates the programs in the top 10 for the season.

Cyan indicates the programs in the top 20 for the season.

Magenta indicates the programs in the top 30 for the season.

Other Legend

Light blue indicates local programming.
Gray indicates encore programming.
Blue-gray indicates news programming.
Light green indicates sporting events.
Light Purple indicates movies.
Red indicates series being burned off and other regularly scheduled programs, including specials.

PBS, the Public Broadcasting Service, is not included; member stations have local flexibility over most of their schedules and broadcast times for network shows may vary. Also not included is Pax TV (now Ion), a venture of Paxson Communications (now Ion Media) that debuted on August 31, 1998; although Pax carried a limited schedule of first-run programs in its early years, its schedule otherwise was composed mainly of syndicated reruns.

Sunday

Monday

Note: UPN only broadcast the first two episodes of Power Play. On August 16, 1999, ABC aired the series premiere of Who Wants to Be a Millionaire at 8:30pm EDT. It was the only 30 minute episode to air on a Monday night.