The 1991 Liquid Tide Trans-Am Tour was the 26th season of the Sports Car Club of America's Trans-Am Series. It was the first season with competition from the sister SCCA Pro Racing World Challenge. 1991 was also the first season since 1979 to have a round outside of the United States and Canada, with a race in Mexico on the schedule that year. Oldsmobile, although very successful in 1991, would never again see success in Trans Am.
| Round | Date | Circuit | Winning driver | Winning vehicle |
|---|---|---|---|---|
| 1 | | 5 May | | Oldsmobile Cutlass |
| 2 | | 19 May | | Chevrolet Camaro |
| 3 | | 2 June | | Oldsmobile Cutlass |
| 4 | | 15 June | | Chevrolet Camaro |
| 5 | | 22 June | | Oldsmobile Cutlass |
| 6 | | 6 July | | Oldsmobile Cutlass |
| 7 | | 14 July | | Chevrolet Camaro |
| 8 | | 10 August | | Chevrolet Camaro |
| 9 | | 18 August | | Chevrolet Camaro |
| 10 | | 24 August | | Oldsmobile Cutlass |
| 11 | | 8 September | | Chevrolet Camaro |
| 12 | | 14 September | | Oldsmobile Cutlass |
| 13 | | 21 September | | Chevrolet Camaro |
| 14 | | 20 October | | Chevrolet Camaro |
| Place | Driver | Points |
|---|---|---|
| 1 | | 360 |
| 2 | | 290 |
| 3 | | 271 |
| 4 | | 269 |
| 5 | | 246 |
| 6 | | 234 |
| 7 | | 230 |
| 8 | | 213 |
| 9 | | 209 |
| 10 | | 202 |
| 11 | | 198 |
| 12 | | 177 |
| 13 | | 171 |
| 14 | | 135 |
| 15 | | 122 |
| 16 | | 116 |
| 17 | | 111 |
| 18 | | 96 |
| 19 | | 91 |
| 20 | | 68 |
| 20 | | 68 |
| 22 | | 66 |
| 22 | | 66 |
| 24 | | 64 |
| 25 | | 54 |
| 25 | | 54 |
| 27 | | 42 |
| 27 | | 42 |
| 29 | | 38 |
| 30 | | 31 |
| 31 | | 30 |
| 32 | | 29 |
| 33 | | 27 |
| 33 | | 27 |
| 35 | | 26 |
| 36 | | 24 |
| 37 | | 21 |
| 37 | | 21 |
| 37 | | 21 |
| 37 | | 21 |
| 41 | | 19 |
| 42 | | 16 |
| 43 | | 15 |
| 43 | | 15 |
| 45 | | 14 |
| 45 | | 14 |
| 47 | | 13 |
| 48 | | 11 |
| 49 | | 8 |
| 49 | | 8 |
| 51 | | 8 |
| 52 | | 7 |
| 53 | | 6 |
| 53 | | 6 |
| 55 | | 5 |
| 56 | | 4 |
| 56 | | 4 |
| 58 | | 3 |
| 59 | | 2 |
| 59 | | 2 |
| 59 | | 2 |
| 62 | | 1 |
| 62 | | 1 |
| 64 | | 0 |
| 64 | | 0 |
| 64 | | 0 |
| 64 | | 0 |
| 64 | | 0 |
| 64 | | 0 |
| 64 | | 0 |