The 2009 Stephen F. Austin Lumberjacks football team represented Stephen F. Austin State University in the 2009 NCAA Division I FCS football season.
The team was led by third-year head coach J. C. Harper and played its home games at Homer Bryce Stadium.
It finished the regular season with a 10–3 record overall and a 6–1 record in the Southland Conference, making the team conference champions.
The team qualified for the playoffs, in which it was eliminated in the quarterfinals by Montana.
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