| Mario Steiner | |
| Birth Date: | 12 December 1982 |
| Birth Place: | Villach, Austria |
| Position: | Midfielder |
| Currentclub: | SV Afritz |
| Youthclubs1: | SV Afritz |
| Youthclubs2: | FC Kärnten |
| Years1: | 2000–2003 |
| Clubs1: | FC Kärnten |
| Caps1: | 58 |
| Goals1: | 1 |
| Years2: | 2003–2004 |
| Clubs2: | BSV Bad Bleiberg |
| Caps2: | 23 |
| Goals2: | 2 |
| Years3: | 2004–2005 |
| Clubs3: | SC-ESV Parndorf 1919 |
| Caps3: | 26 |
| Goals3: | 5 |
| Years4: | 2005–2006 |
| Clubs4: | FC Waidhofen/Ybbs |
| Caps4: | 15 |
| Goals4: | 1 |
| Years5: | 2006 |
| Clubs5: | SV Spittal/Drau |
| Years6: | 2006–2007 |
| Clubs6: | SK St. Andrä |
| Caps6: | 29 |
| Goals6: | 3 |
| Years7: | 2007–2008 |
| Clubs7: | FC Kärnten |
| Caps7: | 21 |
| Goals7: | 2 |
| Years8: | 2008–2009 |
| Clubs8: | Vöcklabrucker SC |
| Caps8: | 27 |
| Goals8: | 2 |
| Years9: | 2009–2011 |
| Clubs9: | FC Gratkorn |
| Caps9: | 34 |
| Goals9: | 2 |
| Years10: | 2011–2012 |
| Clubs10: | Grazer AK |
| Caps10: | 17 |
| Goals10: | 1 |
| Years11: | 2012–2013 |
| Clubs11: | Villacher SV |
| Caps11: | 20 |
| Goals11: | 0 |
| Years12: | 2013–2015 |
| Clubs12: | SV Sachsenburg |
| Caps12: | 21 |
| Goals12: | 3 |
| Years13: | 2015– |
| Clubs13: | SV Afritz |
| Nationalyears1: | 2001–2002 |
| Nationalteam1: | Austria U-21 |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 0 |
Mario Steiner (born 12 December 1982) is an Austrian football midfielder currently playing for SV Afritz.