The 2009 Oklahoma State Cowboys football team represented Oklahoma State University in the 2009 NCAA Division I FBS football season.

The Cowboys, led by fifth-year head coach Mike Gundy, played their home games at Boone Pickens Stadium.

The Cowboys finished the season 9–4, 6–2 in Big 12 play and lost the Cotton Bowl Classic, 21–7, against Ole Miss.

[1] [15] The following players were selected in the 2010 NFL draft: The following Cowboys were signed as undrafted free agents: