| Marcus Wedau | |
| Birth Date: | 1975 12, df=yes |
| Birth Place: | Soltau, West Germany |
| Height: | 1.80 m |
| Position: | Midfielder |
| Years1: | 1993–1998 |
| Clubs1: | KFC Uerdingen 05 |
| Caps1: | 100 |
| Goals1: | 9 |
| Years2: | 1998–2001 |
| Clubs2: | MSV Duisburg |
| Caps2: | 64 |
| Goals2: | 8 |
| Years3: | 2001–2002 |
| Clubs3: | LR Ahlen |
| Caps3: | 8 |
| Goals3: | 0 |
| Years4: | 2002–2005 |
| Clubs4: | Rot-Weiss Essen |
| Caps4: | 73 |
| Goals4: | 10 |
| Years5: | 2005–2006 |
| Clubs5: | VfL Osnabrück |
| Caps5: | 24 |
| Goals5: | 1 |
| Years6: | 2006–2007 |
| Clubs6: | Queensland Roar |
| Caps6: | 10 |
| Goals6: | 0 |
| Years7: | 2007–2008 |
| Clubs7: | KFC Uerdingen 05 |
| Caps7: | 11 |
| Goals7: | 1 |
| Totalcaps: | 290 |
| Totalgoals: | 29 |
| Nationalyears1: | 1994 |
| Nationalteam1: | Germany U18 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 1995–1998 |
| Nationalteam2: | Germany U21 |
| Nationalcaps2: | 12 |
| Nationalgoals2: | 3 |
Marcus Wedau (born 31 December 1975) is a German former professional footballer who played as a midfielder.
Wedau made 12 appearances for the Germany U21 national team scoring three goals.