| Seyi Olajengbesi | |
| Fullname: | Seyi Olajengbesi |
| Height: | 1.96 m |
| Birth Date: | 1980 11, df=yes |
| Birth Place: | Ibadan, Nigeria |
| Position: | Defender |
| Years1: | 1996 |
| Clubs1: | Shooting Stars |
| Years2: | 1997–2000 |
| Clubs2: | Plateau United |
| Years3: | 2001–2004 |
| Clubs3: | Julius Berger FC |
| Years4: | 2002 |
| Clubs4: | → Shooting Stars (loan) |
| Years5: | 2004–2007 |
| Clubs5: | SC Freiburg |
| Caps5: | 62 |
| Goals5: | 1 |
| Years6: | 2008–2013 |
| Clubs6: | Alemannia Aachen |
| Caps6: | 146 |
| Goals6: | 5 |
| Years7: | 2013–2016 |
| Clubs7: | SV Sandhausen |
| Caps7: | 76 |
| Goals7: | 3 |
| Totalcaps: | 284 |
| Totalgoals: | 9 |
| Nationalyears1: | 2002–2004 |
| Nationalteam1: | Nigeria |
| Nationalcaps1: | 8 |
| Nationalgoals1: | 0 |
Seyi Olajengbesi (born 17 November 1980 in Ibadan) is a Nigerian former professional footballer who played as a defender who spent most of his career in Germany, playing for Alemannia Aachen, SC Freiburg, and SV Sandhausen.[1]