In which country did "Rein Me In" debut at number 16?

“Rein Me In” debuted at number 16 in Ireland.

The Sam Fender and Olivia Dean collaboration entered the Irish Singles Chart at number 16 during its opening week. That was a strong initial showing, but the song’s eventual performance went far beyond its debut position: after a lengthy climb, it later reached number one in Ireland.

The Irish success formed part of a broader breakthrough for the song. In the United Kingdom, it initially entered at number 86 before climbing into the top ten. Its slow-burn trajectory became one of the defining features of the release, as sustained streaming and renewed attention pushed it steadily upward.

The country is easy to confuse with Australia or New Zealand because “Rein Me In” also charted strongly in both markets. However, the number 16 opening-week figure specifically belongs to Ireland. The track ultimately became Fender’s first Irish number-one single and Dean’s second.