| Cosmin Mărginean | |
| Fullname: | Cosmin Nicolae Mărginean |
| Birth Date: | 21 November 1978 |
| Birth Place: | Câmpia Turzii, Romania |
| Position: | Midfielder |
| Years1: | 2001–2007 |
| Caps1: | 133 |
| Goals1: | 2 |
| Years2: | 2007–2008 |
| Caps2: | 1 |
| Goals2: | 0 |
| Years3: | 2008 |
| Clubs3: | Okzhetpes |
| Caps3: | ? |
| Goals3: | ? |
| Years4: | 2009–2010 |
| Caps4: | ? |
| Goals4: | 2 |
| Years5: | 2013–2014 |
| Caps5: | ? |
| Goals5: | ? |
| Totalcaps: | 134+ |
| Totalgoals: | 4+ |
| Manageryears1: | 2013–2014 |
| Managerclubs1: | Delta Tulcea |
| Pcupdate: | 28 February 2018 |
Cosmin Nicolae Mărginean (born 21 November 1978) is a Romanian former football player. In his career Mărginean played for Oțelul Galați, Unirea Urziceni, Delta Tulcea and Kazakh club Okzhetpes.