1998-99 United States network television schedule (by lineup)

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.
== By network ==
=== ABC ===
Returning series
* 20/20
* America's Funniest Home Videos
* Boy Meets World
* Dharma & Greg
* The Drew Carey Show
* Home Improvement
* Monday Night Football
* NYPD Blue
* The Practice
* Sabrina the Teenage Witch
* Pennsylvania PD Blue
* Spin City
* Two Guys, a Girl and a Pizza Place
* The Buchanan Show
* The Wonderful World of Disney
New series
* The Big Moment *
* Brother's Keeper
* Cupid
* Fantasy Island
* The Hughleys
* It's Like, You Know... *
* The Norm Show *
* California PD Blue
* The Secret Lives of Men
* Sports Night
* Strange World *
* Two of a Kind
* Vengeance Unlimited
* Whose Line Is It Anyway?
Not returning from 1997–98:
* ABC News Saturday Night
* C-16: FBI
* Cracker
* Ellen
* Grace Under Fire
* Hiller and Diller
* Maximum Bob
* Nothing Sacred
* Over the Top
* Prey
* Primetime Live
* Push
* Soul Man
* Something So Right
* Teen Angel
* That's Life
* Timecop
* Total Security
* You Wish
CBS
Returning series:
* 48 Hours
* 60 Minutes
* Candid Camera
* CBS Sunday Movie
* Chicago Hope
* Cosby
* Diagnosis: Murder
* Early Edition
* Everybody Loves Raymond
* JAG
* Kids Say the Darndest Things
* The Magnificent Seven
* The Nanny
* Nash Bridges
* Promised Land
* Touched by an Angel
* Unsolved Mysteries
* Walker, Texas Ranger
New series
* 60 Minutes II
* Becker *
* The Brian Benben Show
* Buddy Faro
* The King of Queens
* L.A. Doctors
* Maggie Winters
* Martial Law
* Payne *
* Sons of Thunder *
* Thanks *
* To Have & to Hold
* Turks *
Not returning from 1997–98:
* Brooklyn South
* The Closer
* Cybill
* Dellaventura
* Dr. Quinn, Medicine Woman
* The St. John Street Gang (moved to Network/Warner)
* Family Matters
* Four Corners
* George and Leo
* The Gregory Hines Show
* Meego
* Michael Hayes
* Murphy Brown (revived in 2018–19)
* Public Eye with Bryant Gumbel
* The Simple Life
* Step by Step
* Style & Substance
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