| Competition: | AFLR |
| Year: | 1991 |
| Date: | 23 March – 28 September |
| Teams: | 13 |
| Premiers: | Brisbane Bears |
| Count: | 1 |
| Prevseason: | 1990 |
| Nextseason: | 1992 |
The 1991 AFL reserves season was the 72nd season of the AFL reserve grade competition, the Australian rules football competition operating as the second-tier competition to the Australian Football League (AFL).
The premiership was won by the Brisbane Bears after they defeated in the 1991 AFL reserves Grand Final, held as a curtain-raiser to the 1991 AFL Grand Final at Waverley Park on 28 September.[1] This was the first time a non-Victorian club had won an AFL premiership in any grade, and the Bears' only premiership before the club merged with at the end of the 1996 season.[2]
| Team | Qualification | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 22 | 17 | 5 | 0 | 2705 | 2027 | 133.45 | 60 | Finals series | |
| 2 | 22 | 15 | 7 | 0 | 2923 | 2314 | 126.32 | 60 | ||
| 3 | Brisbane Bears (P) | 22 | 14 | 8 | 0 | 2488 | 2366 | 105.16 | 56 | |
| 4 | 22 | 13 | 9 | 0 | 2625 | 2183 | 120.25 | 52 | ||
| 5 | 22 | 13 | 9 | 0 | 2545 | 2346 | 108.48 | 52 | ||
| 6 | 22 | 12 | 10 | 0 | 2347 | 2042 | 114.94 | 48 | ||
| 7 | 22 | 12 | 10 | 0 | 2394 | 2161 | 110.78 | 48 | ||
| 8 | 22 | 11 | 11 | 0 | 2284 | 2183 | 106.83 | 44 | ||
| 9 | 22 | 10 | 12 | 0 | 2293 | 2456 | 93.36 | 40 | ||
| 10 | 22 | 10 | 12 | 0 | 2025 | 2425 | 83.51 | 40 | ||
| 11 | 22 | 6 | 18 | 0 | 1984 | 2617 | 75.81 | 24 | ||
| 12 | 22 | 5 | 17 | 0 | 1859 | 2588 | 71.83 | 20 | ||
| 13 | 22 | 5 | 17 | 0 | 1972 | 2781 | 70.91 | 20 |