| Marios Nicolaou | |
| Fullname: | Marios Nicolaou |
| Birth Date: | 22 March 1981 |
| Birth Place: | Cyprus |
| Clubnumber: | 2 |
| Position: | Defender (right) |
| Years1: | 2001–2005 |
| Years2: | 2005–2006 |
| Years3: | 2007 |
| Years4: | 2008–2009 |
| Clubs4: | MEAP Nisou |
| Caps1: | 74 |
| Caps2: | 11 |
| Goals1: | 1 |
| Goals2: | 0 |
| Nationalteam1: | Cyprus |
| Nationalcaps1: | 8 |
| Nationalgoals1: | 0 |
| Pcupdate: | 1 September 2007 |
Marios Nicolaou (; born March 22, 1981) is a Cypriot defender. His former teams are Olympiakos Nicosia, Nea Salamis Famagusta FC and AC Omonia where he started his career.