2003 Grambling State Tigers football team

The 2003 Grambling State Tigers football team represented Grambling State University as a member of the Southwestern Athletic Conference (SWAC) during the 2003 NCAA Division I-AA football season. Led by sixth-year head coach Doug Williams, the Tigers compiled an overall record of 9–3 and a mark of 6–1 in conference play, and finished as co-champion of the SWAC West Division.