List of number-one singles of 1984 (Ireland)

The following is a list of singles that reached the number-one position on the Irish Singles Chart in 1984. The Irish Singles Chart is compiled weekly by the Irish Recorded Music Association (IRMA). During 1984, the chart was published in Spotlight magazine. Note that chart information from this period may be incomplete or inconsistent due to variations in data collection and publishing practices.

The list details the artist(s), single title, and the date the single first reached the top spot.

• February 4 - Frankie Goes to Hollywood - "Relax"
• March 10 - Nena - "99 Luftballons"
• April 7 - Duran Duran - "The Reflex"
• May 5 - Lionel Richie - "Hello"
• June 23 - Frankie Goes to Hollywood - "Two Tribes"
• August 4 - Wham! - "Wake Me Up Before You Go-Go"
• September 15 - Stevie Wonder - "I Just Called to Say I Love You"
• November 3 - Band Aid - "Do They Know It's Christmas?"