The following is the 1998 MLS national television schedule:. Note: all times are eastern.
| Date | Matchup | Kickoff (ET) | Network |
| March 15 | D.C. United at Miami | 4:00 p.m. | ABC |
| March 21 | Kansas City at D.C. United | 8:00 p.m. | ESPN2 |
| March 26 | Miami at Tampa Bay | 7:30 p.m. | ESPN2 |
| March 29 | Columbus at Dallas | 3:00 p.m. | Univision |
| March 29 | New England at D.C. United | 5:00 p.m. | ESPN |
| April 4 | MetroStars at Kansas City | 8:30 p.m. | ESPN2 |
| April 5 | Dallas at San Jose | 3:00 p.m. | Univision |
| April 11 | Los Angeles at MetroStars | 3:00 p.m. | ABC |
| April 11 | Colorado at D.C. United | 7:30 p.m. | ESPN |
| April 17 | MetroStars at Chicago | 8:30 p.m. | ESPN |
| April 18 | D.C. United at New England | 3:00 p.m. | ABC |
| April 19 | Tampa Bay at Colorado | 3:00 p.m. | Univision |
| April 25 | San Jose at MetroStars | 2:00 p.m. | ABC* |
| April 26 | Columbus at D.C. United | 3:00 p.m. | Univision |
| May 3 | MetroStars at Tampa Bay | 3:00 p.m. | Univision |
| May 9 | Columbus at Miami | 4:00 p.m. | ESPN2 |
| May 10 | Tampa Bay at New England | 3:00 p.m. | Univision |
| May 16 | D.C. United at MetroStars | 1:00 p.m. | ESPN2 |
| May 17 | Los Angeles at Columbus | 3:00 p.m. | Univision |
| May 28 | Miami at Colorado | 9:30 p.m. | ESPN2 |
| May 30 | Chicago at Los Angeles | 10:30 p.m. | ESPN2 |
| May 31 | MetroStars at New England | 3:00 p.m. | Univision |
| June 4 | Los Angeles at Dallas | 8:00 p.m. | ESPN2 |
| June 7 | Dallas at D.C. United | 3:00 p.m. | Univision |
| June 7 | MetroStars at Miami | 3:30 p.m. | ESPN |
| June 11 | San Jose at Chicago | 8:00 p.m. | ESPN2 |
| June 18 | Colorado at Los Angeles | 10:00 p.m. | ESPN2 |
| June 25 | D.C. United at Colorado | 9:00 p.m. | ESPN2 |
| July 2 | Miami at D.C. United | 7:30 p.m. | ESPN2 |
| July 16 | Columbus at Colorado | 9:00 p.m. | ESPN2 |
| July 18 | Chicago at D.C. United | 3:00 p.m. | ABC |
| July 19 | Columbus at MetroStars | 3:00 p.m. | Univision |
| July 25 | Chicago at MetroStars | 3:00 p.m. | ESPN |
| July 26 | Miami at New England | 3:00 p.m. | Univision |
| Aug. 2 | MLS All-Star Game | 2:30 p.m. | ABC |
| Aug. 6 | Miami at Tampa Bay | 7:30 p.m. | ESPN2 |
| Aug. 7 | D.C. United at Dallas | 8:30 p.m. | ESPN |
| Aug. 8 | Los Angeles at Chicago | 4:00 p.m. | ABC |
| Aug. 9 | MetroStars at San Jose | 3:00 p.m. | Univision |
| Aug. 13 | Kansas City at Los Angeles | 10:00 p.m. | ESPN2 |
| Aug. 14 | New England at Tampa Bay | 7:30 p.m. | ESPN |
| Aug. 15 | MetroStars at Miami | 4:00 p.m. | ABC |
| Aug. 16 | Kansas City at Columbus | 3:00 p.m. | Univision |
| Aug. 21 | Chicago at Colorado | 9:30 p.m. | ESPN |
| Aug. 22 | Los Angeles at New England | 4:00 p.m. | ABC |
| Aug. 22 | Dallas at San Jose | 10:30 p.m. | ESPN2 |
| Aug. 23 | Miami at Kansas City | 3:00 p.m. | Univision |
| Aug. 30 | New England at Miami | 3:00 p.m. | Univision |
| Sept. 3 | San Jose at Tampa Bay | 8:00 p.m. | ESPN2 |
| Sept. 6 | MetroStars at Columbus | 3:00 p.m. | Univision |
| Sept. 10 | D.C. United at Kansas City | 10:00 p.m. | ESPN2 (Delay) |
| Sept. 13 | D.C. United at Miami | 3:00 p.m. | Univision |
| Sept. 17 | Kansas City at Chicago | 8:30 p.m. | ESPN2 |
| Sept. 20 | San Jose at Los Angeles | 3:00 p.m. | Univision |
| Sept. 24 | Tampa Bay at Columbus | 8:00 p.m. | ESPN2 |
| Sept. 27 | Tampa Bay at Miami | 3:00 p.m. | Univision |
| Sept. 27 | Chicago at Los Angeles | 7:30 p.m. | ESPN2 |