2009 Cal Poly Mustangs football team

The 2009 Cal Poly Mustangs football team represented California Polytechnic State University during the 2009 NCAA Division I FCS football season.

Cal Poly competed in the Great West Conference (GWC). The 2009 Mustangs were led by first-year head coach Tim Walsh and played home games at Mustang Stadium in San Luis Obispo, California. The team finished the season with a record of four wins and seven losses (4–7, 1–3 GWC). The Mustangs were outscored by their opponents 258–303 for the season.