| Gert Claessens | |
| Height: | 1.89 m |
| Birth Date: | 1972 2, df=yes |
| Birth Place: | Tongeren, Belgium |
| Position: | Midfielder |
| Youthclubs1: | FC Membruggen |
| Years1: | 19??–1992 |
| Years2: | 1992–1994 |
| Years3: | 1994–1999 |
| Years4: | 1999–2000 |
| Years5: | 2001–2003 |
| Years6: | 2004–2006 |
| Years7: | 2007 |
| Clubs1: | RFC Liège |
| Clubs2: | Genk |
| Clubs3: | Club Brugge |
| Clubs4: | Oviedo |
| Clubs5: | Vitesse |
| Clubs6: | Genk |
| Clubs7: | Lierse |
| Caps1: | 9 |
| Caps2: | 59 |
| Caps3: | 108 |
| Caps4: | 8 |
| Caps5: | 75 |
| Caps6: | 42 |
| Goals1: | 0 |
| Goals2: | 12 |
| Goals3: | 39 |
| Goals4: | 0 |
| Goals5: | 15 |
| Goals6: | 3 |
| Nationalyears1: | 1997–1998 |
| Nationalteam1: | Belgium |
| Nationalcaps1: | 4 |
| Nationalgoals1: | 1 |
Gert Claessens (born 21 February 1972 in Tongeren) is a Belgian retired professional footballer who played as a midfielder.[1]