List of top 10 singles in 2021 (Ireland)

This is a list of singles that have peaked in the top 10 of the Irish Singles Chart during 2021, as compiled by the Official Charts Company on behalf of the Irish Recorded Music Association.

Background
Ninety-five songs have charted in the top ten of the Irish Singles Chart in 2021. Of these, eighty-six songs have reached their peak during 2021. Irish singer-songwriter Dermot Kennedy and Italian producers Meduza took the first number one single of the year, with their track "Paradise". In doing so, Kennedy became the first Irish act to replace themselves twice at number one, replacing the last number one of 2020, "Giants". Ed Sheeran's "Afterglow" became the first new track to enter the top-ten in 2021.

Chart debuts
Forty artists has achieved their first top 10 single in 2021 (as of 17 December), either as a lead or featured artist.

Top-ten singles

 * Key
 * – indicates single's top 10 entry was also its chart debut
 * An asterisk indicates the track is in the top 10 dated 31 December 2021.

Entries by artist
The following table shows artists who achieved two or more top 10 entries in 2021, including songs that reached their peak in 2020. The figures include both main artists and featured artists. The culmulative number of weeks an artist's tracks spent in the top ten in 2021 is also shown.