| Year: | 1981 |
| Team: | Southwest Texas State Bobcats |
| Sport: | football |
| Conference: | Lone Star Conference |
| Short Conf: | LSC |
| Record: | 13–1 |
| Conf Record: | 6–1 |
| Head Coach: | Jim Wacker |
| Hc Year: | 3rd |
| Def Coach: | Tom Mueller |
| Dc Year: | 3rd |
| Stadium: | Bobcat Stadium |
| Champion: | NCAA Division II champion LSC champion |
| Bowl: | NCAA Division II Championship Game |
| Bowl Result: | W 42–13 vs. North Dakota State |
The 1981 Southwest Texas State Bobcats football team was an American football team that represented Southwest Texas State University—now known as Texas State University–as a member of the Lone Star Conference (LSC) during the 1981 NCAA Division II football season. The Bobcats played their home games at the newly opened Bobcat Stadium in San Marcos, Texas. Led by third-year head coach Jim Wacker, Southwest Texas State compiled an overall record of 13–1 and claimed the LSC title with a conference mark of 6–1. They won the NCAA Division II Football Championship with a win over North Dakota State, 42–13, in the Palm Bowl.[1] [2]