2005 Grambling State Tigers football team

The 2005 Grambling State Tigers football team represented Grambling State University as a member of the Southwestern Athletic Conference (SWAC) during the 2005 NCAA Division I-AA football season. Led by second-year head coach Melvin Spears, the Tigers compiled an overall record of 11–1 and a mark of 9–0 in conference play, and finished as both SWAC and black college national champion.