| Ştefan Nanu | |
| Fullname: | Ștefan Dumitru Nanu |
| Height: | 1.68m |
| Birth Date: | 1968 9, df=yes |
| Birth Place: | Filiași, Romania |
| Position: | Left back |
| Years1: | 1991–1995 |
| Years2: | 1995–1997 |
| Years3: | 1997–1999 |
| Years4: | 1999–2003 |
| Years5: | 2003 |
| Years6: | 2003–2005 |
| Years7: | 2005–2008 |
| Clubs1: | Electroputere Craiova |
| Clubs2: | Farul Constanța |
| Clubs3: | Rapid București |
| Clubs4: | Vitesse Arnhem |
| Clubs5: | Steaua București |
| Clubs6: | Oțelul Galați |
| Clubs7: | Poiana Câmpina |
| Caps1: | 93 |
| Caps2: | 52 |
| Caps3: | 60 |
| Caps4: | 61 |
| Caps5: | 5 |
| Caps6: | 33 |
| Caps7: | 48 |
| Totalcaps: | 352 |
| Goals1: | 0 |
| Goals2: | 0 |
| Goals3: | 1 |
| Goals4: | 1 |
| Goals5: | 0 |
| Goals6: | 0 |
| Goals7: | 0 |
| Totalgoals: | 2 |
| Nationalyears1: | 1999–2000 |
| Nationalteam1: | Romania |
| Nationalcaps1: | 7 |
| Nationalgoals1: | 0 |
| Manageryears1: | 2005–2007 |
| Managerclubs1: | FCM Câmpina |
| Manageryears2: | 2007 |
| Managerclubs2: | Petrolul Ploiești |
| Manageryears3: | 2008 |
| Managerclubs3: | Inter Gaz București |
| Manageryears4: | 2010–2013 |
| Managerclubs4: | Minerul Motru |
| Manageryears5: | 2014 |
| Managerclubs5: | Farul Constanța |
| Manageryears6: | 2014–2015 |
| Managerclubs6: | FC Ter Apel (youth) |
| Manageryears7: | 2015–2017 |
| Managerclubs7: | FC Emmen (youth) |
| Manageryears8: | 2017–2018 |
| Managerclubs8: | Râmnicu Vâlcea U17 |
| Manageryears9: | 2018 |
| Managerclubs9: | Poli Timișoara |
| Manageryears10: | 2019–2023 |
| Managerclubs10: | CSM Deva |
Ștefan Dumitru Nanu (born 8 September 1968, in Filiași) is a Romanian former footballer and current manager. He played as a defender.