These are the Billboard Hot 100 number one hits of 1984.
| Issue Date | Song | Artist |
| January 7 | "Say Say Say" | Paul McCartney and Michael Jackson |
| January 14 | "Say Say Say" | Paul McCartney and Michael Jackson |
| January 21 | "Owner of a Lonely Heart" | Yes |
| January 28 | "Owner of a Lonely Heart" | Yes |
| February 4 | "Karma Chameleon" | Culture Club |
| February 11 | "Karma Chameleon" | Culture Club |
| February 18 | "Karma Chameleon" | Culture Club |
| February 25 | "Jump" | Van Halen |
| March 3 | "Jump" | Van Halen |
| March 10 | "Jump" | Van Halen |
| March 17 | "Jump" | Van Halen |
| March 24 | "Jump" | Van Halen |
| March 31 | "Footloose" | Kenny Loggins |
| April 7 | "Footloose" | Kenny Loggins |
| April 14 | "Footloose" | Kenny Loggins |
| April 21 | "Against All Odds (Take a Look at Me Now)" | Phil Collins |
| April 28 | "Against All Odds (Take a Look at Me Now)" | Phil Collins |
| May 5 | "Against All Odds (Take a Look at Me Now)" | Phil Collins |
| May 12 | "Hello" | Lionel Richie |
| May 19 | "Hello" | Lionel Richie |
| May 26 | "Let's Hear It for the Boy" | Deniece Williams |
| June 2 | "Let's Hear It for the Boy" | Deniece Williams |
| June 9 | "Time After Time" | Cyndi Lauper |
| June 16 | "Time After Time" | Cyndi Lauper |
| June 23 | "The Reflex" | Duran Duran |
| June 30 | "The Reflex" | Duran Duran |
| July 7 | "When Doves Cry" | Prince |
| July 14 | "When Doves Cry" | Prince |
| July 21 | "When Doves Cry" | Prince |
| July 28 | "When Doves Cry" | Prince |
| August 4 | "When Doves Cry" | Prince |
| August 11 | "Ghostbusters" | Ray Parker Jr. |
| August 18 | "Ghostbusters" | Ray Parker Jr. |
| August 25 | "Ghostbusters" | Ray Parker Jr. |
| September 1 | "What's Love Got to Do with It" | Tina Turner |
| September 8 | "What's Love Got to Do with It" | Tina Turner |
| September 15[1] | "What's Love Got to Do with It" | Tina Turner |
| September 22[2] | "Missing You" | John Waite |
| September 29 | "Let's Go Crazy" | Prince and the Revolution |
| October 6[3] | "Let's Go Crazy" | Prince and the Revolution |
| October 13[4] | "I Just Called to Say I Love You" | Stevie Wonder |
| October 20[5] | "I Just Called to Say I Love You" | Stevie Wonder |
| October 27[6] | "I Just Called to Say I Love You" | Stevie Wonder |
| November 3[7] | "Caribbean Queen (No More Love on the Run)" | Billy Ocean |
| November 10[8] | "Caribbean Queen (No More Love on the Run)" | Billy Ocean |
| November 17[9] | "Wake Me Up Before You Go-Go" | Wham! |
| November 24[10] | "Wake Me Up Before You Go-Go" | Wham! |
| December 1[11] | "Wake Me Up Before You Go-Go" | Wham! |
| December 8[12] | "Out of Touch" | Daryl Hall and John Oates |
| December 15[13] | "Out of Touch" | Daryl Hall and John Oates |
| December 22[14] | "Like a Virgin" | Madonna |
| December 29 | "Like a Virgin" | Madonna |
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