1991 National Invitation Tournament
The 1991 National Invitation Tournament was the 1991 edition of the annual NCAA college basketball competition. This tournament adopted the tenths-second game clock in the final minute of every period.
Selected teams
Below is a list of the 32 teams selected for the tournament.| Team | Conference | Overall record | Appearance | Last bid |
| American South | 21–8 | 4th | 1989 | |
| MAC | 21–9 | 1st | Never | |
| Boise State | Big Sky | 18–10 | 3rd | 1989 |
| MAC | 17–12 | 10th | 1990 | |
| Midwestern Collegiate | 18–10 | 4th | 1989 | |
| Metro | 17–11 | 8th | 1990 | |
| Big Eight | 15–13 | 3rd | 1940 | |
| MEAC | 19–10 | 1st | Never | |
| Northeast | 22–8 | 1st | Never | |
| Patriot | 24–7 | 16th | 1990 | |
| SoCon | 20–8 | 1st | Never | |
| Atlantic 10 | 19–11 | 1st | Never | |
| Houston | Southwest | 18–10 | 5th | 1988 |
| CAA | 19–9 | 3rd | 1990 | |
| MAAC | 19–9 | 11th | 1987 | |
| Metro | 16–14 | 11th | 1990 | |
| Michigan | Big Ten | 14–14 | 5th | 1984 |
| Big Eight | 16–14 | 4th | 1982 | |
| Big East | 17–12 | 11th | 1986 | |
| Southwest | 16–13 | 2nd | 1943 | |
| MAAC | 23–9 | 2nd | 1988 | |
| Metro | 19–12 | 5th | 1983 | |
| Sun Belt | 19–10 | 4th | 1985 | |
| Missouri Valley | 16–13 | 6th | 1990 | |
| Missouri Valley | 21–11 | 2nd | 1986 | |
| Stanford | Pac-10 | 15–13 | 3rd | 1990 |
| Missouri Valley | 18–11 | 6th | 1990 | |
| Sun Belt | 18–12 | 3rd | 1989 | |
| Atlantic 10 | 17–11 | 8th | 1990 | |
| Atlantic 10 | 16–13 | 9th | 1988 | |
| Wisconsin | Big Ten | 14–14 | 2nd | 1989 |
| WAC | 19–11 | 4th | 1986 |