| Year: | 2009 |
| Team: | Stony Brook Seawolves |
| Sport: | football |
| Conference: | Big South Conference |
| Short Conf: | Big South |
| Record: | 6–5 |
| Conf Record: | 5–1 |
| Head Coach: | Chuck Priore |
| Hc Year: | 4th |
| Off Coach: | Jeff Behrman |
| Oc Year: | 4th |
| Def Coach: | Jim Gush |
| Dc Year: | 1st |
| Stadium: | Kenneth P. LaValle Stadium |
| Champion: | Big South co-champion |
The 2009 Stony Brook Seawolves football team represented Stony Brook University as a member of the Big South Conference during the 2009 NCAA Division I FCS football season. The team was led by fourth-year head coach Chuck Priore and played it home games at Kenneth P. LaValle Stadium at Stony Brook, New York. The Seawolves compiled an overall record of 6–5 with a mark of 5–1 in conference place, sharing the Big South title with Liberty. This was Stony Brook's first Big South championship.