| Year: | 1966 |
| Team: | Lamar Tech Cardinals |
| Sport: | football |
| Conference: | Southland Conference |
| Short Conf: | Southland |
| Record: | 6–4 |
| Conf Record: | 3–1 |
| Head Coach: | Vernon Glass |
| Hc Year: | 4th |
| Stadium: | Cardinal Stadium |
| Champion: | Southland co-champion |
The 1966 Lamar Tech Cardinals football team represented Lamar State College of Technology—now known as Lamar University—as a member of the Southland Conference during the 1966 NCAA College Division football season. Led by fourth-year head coach Vernon Glass, the Cardinals compiled an overall record of 6–4 with a mark of 3–1 in conference play, sharing the Southland title .sharing the conference championship with Arlington State. Lamar Tech played home games at Cardinal Stadium in Beaumont, Texas.