| Marcel Ketelaer | |
| Birth Date: | 3 November 1977 |
| Birth Place: | Mönchengladbach, West Germany |
| Height: | 1.73 m |
| Position: | Striker |
| Currentclub: | Admira Wacker Mödling (sporting director) |
| Youthyears1: | 1984–1995 |
| Youthclubs1: | Borussia Mönchengladbach |
| Years1: | 1996–2000 |
| Caps1: | 84 |
| Goals1: | 11 |
| Clubs1: | Borussia M'gladbach |
| Years2: | 2000–2002 |
| Caps2: | 29 |
| Goals2: | 3 |
| Clubs2: | Hamburger SV |
| Years3: | 2002–2003 |
| Caps3: | 19 |
| Goals3: | 0 |
| Clubs3: | → Borussia M'gladbach (loan) |
| Years4: | 2003–2004 |
| Caps4: | 7 |
| Goals4: | 0 |
| Clubs4: | Borussia M'gladbach |
| Years5: | 2004–2005 |
| Caps5: | 4 |
| Goals5: | 0 |
| Clubs5: | 1. FC Nürnberg |
| Years6: | 2005–2006 |
| Caps6: | 14 |
| Goals6: | 0 |
| Clubs6: | Rot Weiss Ahlen |
| Years7: | 2006–2007 |
| Caps7: | 39 |
| Goals7: | 7 |
| Clubs7: | FC Superfund |
| Years8: | 2007–2008 |
| Caps8: | 6 |
| Goals8: | 0 |
| Clubs8: | SK Austria Kärnten |
| Years9: | 2008–2009 |
| Caps9: | 12 |
| Goals9: | 0 |
| Clubs9: | SK Rapid Wien |
| Years10: | 2010–2011 |
| Caps10: | 29 |
| Goals10: | 2 |
| Clubs10: | FC Pasching |
| Nationalyears1: | 1997–1999 |
| Nationalteam1: | Germany U-21 |
| Nationalcaps1: | 10 |
| Nationalgoals1: | 3 |
| Manageryears1: | 2012–2013 |
| Managerclubs1: | FC Blau-Weiß Linz II (player-coach) |
| Manageryears2: | 2013–2014 |
| Managerclubs2: | FC Blau-Weiß Linz (assistant) |
| Manageryears3: | 2014 |
| Managerclubs3: | SK Vorwärts Steyr (assistant) |
| Manageryears4: | 2014–2015 |
| Managerclubs4: | SK Vorwärts Steyr |
| Manageryears5: | 2015–2016 |
| Managerclubs5: | ASKÖ Oedt |
| Manageryears6: | 2017–2018 |
| Managerclubs6: | SKN St. Pölten (assistant) |
| Manageryears7: | 2017 |
| Managerclubs7: | SKN St. Pölten (caretaker) |
| Manageryears8: | 2018–2020 |
| Managerclubs8: | SKN St. Pölten (coordinator) |
| Manageryears9: | 2018 |
| Managerclubs9: | SKN St. Pölten (caretaker) |
| Manageryears10: | 2021– |
| Managerclubs10: | Admira Wacker Mödling (sporting director) |
Marcel Ketelaer (born 3 November 1977) is a German professional football coach and a former striker.[1] He is the sporting director for Admira Wacker Mödling.