| One Day | |
| Cover: | Kodaline-Oneday.jpg |
| Type: | single |
| Artist: | Kodaline |
| Album: | In a Perfect World |
| Released: | 6 February 2014 |
| Recorded: | 2012 |
| Genre: | Alternative rock, indie folk |
| Length: | 4:15 |
| Label: | B-Unique |
| Producer: | Stephen Harris |
| Prev Title: | All I Want |
| Prev Year: | 2014 |
| Next Title: | Honest |
| Next Year: | 2014 |
"One Day" is a song by Dublin-based alternative rock quartet Kodaline. The song was released as a digital download on 2014, as the fifth single from their debut studio album In a Perfect World (2013).
A music video to accompany the release of "One Day" was first released onto YouTube on 27 January 2014 at a total length of three minutes and forty-six seconds.