| Year: | 1991 |
| Competition: | SANFL |
| Match Type: | Grand Final |
| Home: | |
| Home Abbr: | NTH |
| Away: | |
| Away Abbr: | WA |
| Home Qtr1: | 5.4 (34) |
| Home Qtr2: | 11.9 (75) |
| Home Qtr3: | 15.12 (102) |
| Home Qtr4: | 21.22 (148) |
| Away Qtr1: | 4.2 (26) |
| Away Qtr2: | 7.3 (45) |
| Away Qtr3: | 10.4 (64) |
| Away Qtr4: | 11.7 (73) |
| Home Score: | 21.22 (148) |
| Away Score: | 11.7 (73) |
| Date: | Saturday, 5 October (2:10 pm) |
| Stadium: | Football Park |
| Attendance: | 39,276 |
| Last: | 1990 |
| Next: | 1992 |
The 1991 South Australian National Football League (SANFL) Grand Final saw North Adelaide defeat West Adelaide by 75 points. The match was played on Saturday 5 October 1991 at Football Park in front of a crowd of 39,276.