| Un día | |
| Type: | studio |
| Artist: | Juana Molina |
| Cover: | Undia.jpg |
| Released: | 6 October 2008 |
| Genre: |
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| Label: |
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| Producer: | Juana Molina |
| Prev Title: | Son |
| Prev Year: | 2006 |
| Next Title: | Wed 21 |
| Next Year: | 2013 |
Un día is the fifth studio album by Argentine singer-songwriter Juana Molina. It was first released on 6 October 2008 by Domino Records. Sonically, the album is abstract and consists of layered loops. It received generally positive reviews from music critics.