This is a list of singles that reached number one on the Cash Box Top 100 Singles chart in 1984, present in chronological order.[1]
| Indicates best-performing single of 1984 |
| Issue date | Song | Artist | |
|---|---|---|---|
| January 7 | "Union of the Snake" | Duran Duran | |
| January 14 | |||
| January 21 | "Owner of a Lonely Heart" | Yes | |
| January 28 | |||
| February 4 | "Karma Chameleon" | Culture Club | |
| February 11 | |||
| February 18 | |||
| February 25 | "Jump" | Van Halen | |
| March 3 | |||
| March 10 | "99 Luftballons" | Nena | |
| March 17 | "Girls Just Want to Have Fun" | ||
| March 24 | |||
| March 31 | "Footloose" | Kenny Loggins | |
| April 7 | |||
| April 14 | |||
| April 21 | "Against All Odds (Take a Look at Me Now)" | Phil Collins | |
| April 28 | |||
| May 5 | |||
| May 12 | "Hello" | Lionel Richie | |
| May 19 | |||
| May 26 | "Let's Hear It for the Boy" | Deniece Williams | |
| June 2 | |||
| June 9 | "Time After Time" | Cyndi Lauper | |
| June 16 | "The Reflex" | Duran Duran | |
| June 23 | |||
| June 30 | "Dancing in the Dark" | Bruce Springsteen | |
| July 7 | |||
| July 14 | bgcolor=#FFFF99 rowspan="4" | "When Doves Cry" | Prince |
| July 21 | |||
| July 28 | |||
| August 4 | |||
| August 11 | "Ghostbusters" | Ray Parker Jr. | |
| August 18 | |||
| August 25 | "What's Love Got to Do with It" | Tina Turner | |
| September 1 | |||
| September 8 | |||
| September 15 | "Missing You" | John Waite | |
| September 22 | |||
| September 29 | "Let's Go Crazy" | Prince and the Revolution | |
| October 6 | |||
| October 13 | "I Just Called to Say I Love You" | Stevie Wonder | |
| October 20 | |||
| October 27 | |||
| November 3 | |||
| November 10 | "Purple Rain" | Prince and the Revolution | |
| November 17 | |||
| November 24 | "Wake Me Up Before You Go-Go" | Wham! | |
| December 1 | |||
| December 8 | "I Feel for You" | ||
| December 15 | "The Wild Boys" | Duran Duran | |
| December 22 | |||
| December 29 | "Like a Virgin" | Madonna | |