List of most watched United States television broadcasts of 1989
# List of most watched United States television broadcasts of 1989

The following is a list of most watched United States television broadcasts of 1989 (single-network only) according to Nielsen.

## Most watched by week

| Week of | Program | Network | Viewers (millions) |
| - | - | - | - |
| January 2 | The Cosby Show | NBC | 46.1 |
| January 9 | The Cosby Show | NBC | 48.4 |
| January 16 | Super Bowl XXIII | NBC | 81.6 |
| January 23 | The Cosby Show | NBC | 44.1 |
| January 30 | The Cosby Show | NBC | 45.7 |
| February 6 | The Cosby Show | NBC | 44.2 |
| February 13 | The Cosby Show | NBC | 43.8 |
| February 20 | The Cosby Show | NBC | 45.0 |
| February 27 | The Cosby Show | NBC | 42.3 |
| March 6 | Roseanne | ABC | 44.3 |
| March 13 | Roseanne | ABC | 41.2 |
| March 20 | Roseanne | ABC | 41.2 |
| March 27 | 61st Academy Awards | ABC | 42.6 |
| April 3 | Roseanne | ABC | 36.2 |
| April 10 | Roseanne | ABC | 39.2 |
| April 17 | Roseanne | ABC | 41.8 |
| April 24 | Roseanne | ABC | 33.2 |
| May 1 | Roseanne | ABC | 35.8 |
| May 8 | Family Ties | NBC | 36.3 |
| May 15 | Everybody's Baby: The Rescue of Jessica McClure | ABC | 37.6 |
| May 22 | I Know My First Name Is Steven, Part 2 | NBC | 40.3 |
| May 29 | Roseanne | ABC | 31.8 |
| June 5 | Roseanne | ABC | 28.5 |
| June 12 | Roseanne | ABC | 29.0 |
| June 19 | Roseanne | ABC | 27.6 |
| June 26 | Roseanne | ABC | 26.9 |
| July 3 | Cheers | NBC | 24.1 |
| July 10 | Roseanne | ABC | 26.3 |
| July 17 | Roseanne | ABC | 26.2 |
| July 24 | Roseanne | ABC | 25.5 |
| July 31 | Roseanne | ABC | 28.5 |
| August 7 | Roseanne | ABC | 28.2 |
| August 14 | Roseanne | ABC | 27.9 |
| August 21 | Roseanne | ABC | 30.4 |
| August 28 | Roseanne | ABC | 30.1 |
| September 4 | Cheers | NBC | 26.5 |
| September 11 | Roseanne | ABC | 39.4 |
| September 18 | The Cosby Show | NBC | 39.3 |
| September 25 | Roseanne | ABC | 41.7 |
| October 2 | Roseanne | ABC | 43.5 |
| October 9 | Roseanne | ABC | 40.8 |
| October 16 | The Cosby Show | NBC | 38.0 |
| October 23 | Roseanne | ABC | 38.6 |
| October 30 | The Cosby Show | NBC | 40.2 |
| November 6 | The Cosby Show | NBC | 42.3 |
| November 13 | The Cosby Show | NBC | 41.8 |
| November 20 | Roseanne | ABC | 38.8 |
| November 27 | The Cosby Show | NBC | 42.8 |
| December 4 | The Cosby Show | NBC | 37.4 |
| December 11 | Roseanne | ABC | 37.3 |
| December 18 | Roseanne | ABC | 33.8 |
| December 25 | AFC Wild Card Game | NBC | 36.1 |
