This lists songs that hit number one on the charts in the US during 1990. If a song spent nonconsecutive weeks at number one, the number of weeks for each occurrence at the top is shown in parenthesis.
| Date | Artist - Title | Weeks at #1 |
| December 17 1989 – January 13 1990 | Phil Collins - Another Day In Paradise | 4 |
| January 14 – February 3 1990 | Michael Bolton - How Am I Supposed To Love Without You | 3 |
| February 4 – 24 1990 | Paula Abdul - Opposites Attract | 3 |
| February 25 – March 17 1990 | Janet Jackson - Escapade | 3 |
| March 18 – 31 1990 | Alannah Myles - Black Velvet | 2 |
| April 1 – 7 1990 | Taylor Dayne - Love Will Lead You Back | 1 |
| April 8 – 14 1990 | Tommy Page - I'll Be Your Everything | 1 |
| April 15 – May 12 1990 | Sinead O'Connor - Nothing Compares 2 U | 4 |
| May 13 – June 2 1990 | Madonna - Vogue | 3 |
| June 3 – 9 1990 | Wilson Phillips - Hold On | 1 |
| June 10 – 23 1990 | Roxette - It Must Have Been Love | 2 |
| June 24 – July 14 1990 | New Kids On The Block - Step by Step | 3 |
| July 15 – 28 1990 | Glenn Medeiros feat. Bobby Brown - She Ain't Worth It | 2 |
| July 29 – August 25 1990 | Mariah Carey - Vision of Love | 4 |
| August 26 – September 1 1990 | Sweet Sensation - If Wishes Came True | 1 |
| September 2 – 8 1990 | Jon Bon Jovi - Blaze of Glory | 1 |
| September 9 – 22 1990 | Wilson Phillips - Release Me | 2 |
| September 23 – 29 1990 | Nelson - (Can't Live Without Your) Love and Affection | 1 |
| September 30 – October 6 1990 | Maxi Priest - Close to You | 1 |
| October 7 – 13 1990 | George Michael - Praying for Time | 1 |
| October 14 – 20 1990 | James Ingram - I Don't Have the Heart | 1 |
| October 21 – 27 1990 | Janet Jackson - Black Cat | 1 |
| October 28 – November 3 1990 | Vanilla Ice - Ice Ice Baby | 1 |
| November 4 – 24 1990 | Mariah Carey - Love Takes Time | 3 |
| November 25 – December 1 1990 | Whitney Houston - I'm Your Baby Tonight | 1 |
| December 2 – 29 1990 | Stevie B - Because I Love You (The Postman Song) | 4 |
| December 30 1990 – January 12 1991 | Madonna - Justify My Love | 2 |
27 different songs hit number one in the US during 1990.
Top 5 Songs of 1990
1: Wilson Phillips - Hold On
2: Roxette - It Must Have Been Love
3: Sinead O'Connor - Nothing Compares 2 U
4: Bell Biv Devoe - Poison
5: Madonna - Vouge
2: Roxette - It Must Have Been Love
3: Sinead O'Connor - Nothing Compares 2 U
4: Bell Biv Devoe - Poison
5: Madonna - Vouge