| Year: | 1966 |
| Team: | LSU Tigers |
| Sport: | football |
| Conference: | Southeastern Conference |
| Short Conf: | SEC |
| Record: | 5–4–1 |
| Conf Record: | 3–3 |
| Head Coach: | Charles McClendon |
| Hc Year: | 5th |
| Stadium: | Tiger Stadium |
The 1966 LSU Tigers football team represented Louisiana State University (LSU) as a member of the Southeastern Conference (SEC) during the 1966 NCAA University Division football season. Led by fifth-year head coach Charles McClendon, the Tigers compiled an overall record of 5–4–1 with a mark of 3–3 in conference play, placing sixth in the SEC.