| Sebastiaan Steur | |
| Fullname: | Sebastiaan Steur |
| Birth Date: | 8 March 1984[1] |
| Birth Place: | Naarden, North Holland, Netherlands |
| Height: | 1.87 m |
| Position: | Striker, winger |
| Youthclubs1: | ASC Waterwijk |
| Youthclubs2: | Ajax |
| Years1: | 2002–2005 |
| Clubs1: | Volendam |
| Caps1: | 60 |
| Goals1: | 6 |
| Years2: | 2005–2008 |
| Clubs2: | Heerenveen |
| Caps2: | 3 |
| Goals2: | 0 |
| Years3: | 2006–2008 |
| Clubs3: | Excelsior |
| Caps3: | 44 |
| Goals3: | 5 |
| Years4: | 2008–2010 |
| Clubs4: | Heracles Almelo |
| Caps4: | 14 |
| Goals4: | 2 |
| Years5: | 2010–2012 |
| Clubs5: | Spakenburg |
| Caps5: | 44 |
| Goals5: | 12 |
| Totalcaps: | 165 |
| Totalgoals: | 25 |
Sebastiaan Steur (born 8 March 1984, in Naarden) is a Dutch former footballer who played as a striker. He formerly played for FC Volendam, SC Heerenveen, SBV Excelsior, Heracles Almelo and Spakenburg.