| Mode: | football |
| Year: | 2003 |
| Team: | Oklahoma State Cowboys |
| Conference: | Big 12 Conference |
| Division: | South Division |
| Short Conf: | Big 12 |
| Record: | 9–4 |
| Conf Record: | 5–3 |
| Head Coach: | Les Miles |
| Hc Year: | 3rd |
| Off Coach: | Mike Gundy |
| Oc Year: | 3rd |
| Def Coach: | Bill Clay |
| Dc Year: | 3rd |
| Off Scheme: | Pro spread |
| Def Scheme: | 3–4 |
| Stadium: | Boone Pickens Stadium |
| Bowl: | Cotton Bowl Classic |
| Bowl Result: | L 28–31 vs. Ole Miss |
The 2003 Oklahoma State Cowboys football team represented Oklahoma State University during the 2003 NCAA Division I-A football season. They participated as members of the Big 12 Conference in the South Division. They played their home games at Boone Pickens Stadium in Stillwater, Oklahoma. They were coached by head coach Les Miles.
Vernand Morency, starting in place for an injured Tatum Bell, rushed for a career-best 269 yards and three touchdowns.