This lists songs that hit number one on the charts in the US during 1973. 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 31 1972 – January 20 1973 | Carly Simon - You're So Vain | 3 |
| January 21 – 27 1973 | Stevie Wonder - Superstition | 1 |
| January 28 – February 17 1973 | Elton John - Crocodile Rock | 3 |
| February 18 – March 17 1973 | Roberta Flack - Killing Me Softly With His Song | 5 (4) |
| March 18 – 24 1973 | O'Jays - Love Train | 1 |
| March 25 – 31 1973 | Roberta Flack - Killing Me Softly With His Song | 5 (1) |
| April 1 – 14 1973 | Vicki Lawerence - The Night The Lights Went Out In Georgia | 2 |
| April 15 – May 12 1973 | Tony Orlando and Dawn - Tie a Yellow Ribbon Round the Old Oak Tree | 4 |
| May 13 – 19 1973 | Stevie Wonder - You Are the Sunshine of My Life | 1 |
| May 20 – 26 1973 | Edgar Winter - Frankenstein | 1 |
| May 27 – June 23 1973 | Paul McCartney - My Love | 4 |
| June 24 – 30 1973 | George Harrison - Give Me Love (Give Me Peace On Earth) | 1 |
| July 1 – 14 1973 | Billy Preston - Will It Go Round In Circles | 2 |
| July 15 – 28 1973 | Jim Croce - Bad, Bad Leroy Brown | 2 |
| July 29 – August 11 1973 | Maureen McGovern - The Morning After | 2 |
| August 12 – 18 1973 | Diana Ross - Touch Me In The Morning | 1 |
| August 19 – September 1 1973 | Stories - Brother Louie | 2 |
| September 2 – 8 1973 | Marvin Gaye - Let's Get It On | 2 (1) |
| September 9 – 15 1973 | Helen Reddy - Delta Dawn | 1 |
| September 16 – 22 1973 | Marvin Gaye - Let's Get It On | 2 (1) |
| September 23 – 29 1973 | Grand Funk Railroad - We're an American Band | 1 |
| September 30 – October 13 1973 | Cher - Half-Breed | 2 |
| October 14 – 20 1973 | Rolling Stones - Angie | 1 |
| October 21 – November 3 1973 | Gladys Knight and The Pips - Midnight Train To Georgia | 2 |
| November 4 – 17 1973 | Eddie Kendricks - Keep On Truckin' | 2 |
| November 18 – 24 1973 | Ringo Starr - Photograph | 1 |
| November 25 – December 8 1973 | Carpenters - Top Of The World | 2 |
| December 9 – 22 1973 | Charlie Rich - The Most Beautiful Girl | 2 |
| December 23 1973 – January 5 1974 | Jim Croce - Time In A Bottle | 2 |
27 different songs hit number one in the US during 1973.
Top 5 Songs of 1973

1: Tony Orlando and Dawn - Tie A Yellow Ribbon 'Round The Ole Oak Tree
2: Jim Croce - Bad, Bad Leroy Brown
3: Roberta Flack - Killing Me Softly With His Song
4: Marvin Gaye - Let's Get It On
5: Paul McCartney and Wings - My Love
2: Jim Croce - Bad, Bad Leroy Brown
3: Roberta Flack - Killing Me Softly With His Song
4: Marvin Gaye - Let's Get It On
5: Paul McCartney and Wings - My Love