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.

Date	Time	Opponent	Site	TV	Result	Attendance	Source
September 5	7:00 pm	at Hofstra*	James M. Shuart Stadium Hempstead, NY	FiOS1 / Big South Net	L 10–17	7,160	[1]
September 12	7:00 pm	at Colgate*	Andy Kerr Stadium Hamilton, NY	Big South Net	L 13–23	3,122	[2]
September 19	6:00 pm	Brown*	Kenneth P. LaValle Stadium Stony Brook, NY	Big South Net	W 21–20	5,709
September 26	6:00 pm	at UMass*	Warren McGuirk Alumni Stadium Hadley, MA	Big South Net	L 17–44	16,122
October 3	3:00 pm	Presbyterian	Kenneth P. LaValle Stadium Stony Brook, NY	Big South Net	W 52–14	6,243
October 10	2:00 pm	at North Dakota*	Alerus Center Grand Forks, ND	Big South Net	L 41–21	8,494
October 17	1:30 pm	at VMI	Alumni Memorial Field Lexington, VA	Big South Net	W 27–20	7,112
October 24	3:30 pm	Coastal Carolina	Kenneth P. LaValle Stadium Stony Brook, NY	MASN / Big South Net	W 16–10	3,292
October 31	1:30 pm	at Gardner–Webb	Ernest W. Spangler Stadium Boiling Springs, NC	Big South Net	W 24–14	5,430
November 14	1:30 pm	at Charleston Southern	Buccaneer Field Charleston, SC	Big South Net	L 27–30 OT	2,954
November 21	1:00 pm	No. 16 Liberty	Kenneth P. LaValle Stadium Stony Brook, NY	Big South Net	W 36–33	3,964
*Non-conference game Homecoming Rankings from The Sports Network Poll released prior to the game All times are in Eastern time