| Liina Luik | |
| Birth Date: | 14 October 1985 |
| Country: | Estonia |
| Sport: | Track and field |
| Event: | Marathon |
| Pb: | 2:39:42 (2015) |
| Club: | Tartu Ulikooli Akadeemiline Spordiklubi |
| Coach: | Harry Lemberg |
| Education: | University of Tartu Viljandi Culture Academy |
| Show-Medals: | yes |
Liina Luik (born 14 October 1985) is an Estonian long-distance runner.[1] She competed in the marathon at the 2015 World Championships in Athletics in Beijing, China.[2]
She is one of an identical triplet, sister of Lily and Leila. All three qualified to participate in the marathon event representing Estonia at the 2016 Summer Olympics in Rio de Janeiro. The triplets were professional dancers before Liina brought them to running.