El National Invitation Tournament 1991 fue la quincuagésimo cuarta edición del National Invitation Tournament. La disputaron 32 equipos, celebrándose la fase final de la competición en el Madison Square Garden de Nueva York. El ganador fue la Universidad de Stanford, que lograba su primer título en esta competición.
Cuadro final de resultados.[1]
| Primera ronda
| | | Segunda ronda
| | | Cuartos de final
| |
| | | | | | | | | | | | | | |
| |
| Providence
| 98
| | |
| |
| James Madison
| 93
| | |
| | Providence
| 85
| |
|
| |
| | | West Virginia
| 79
| |
| West Virginia
| 86
| |
| |
| Furman
| 67
| | |
| | | Providence
| 74
| |
|
| |
| | | Oklahoma
| 83
| |
| Cincinnati
| 82
| | |
| |
| Ball State
| 55
| | |
| | Cincinnati
| 81
| |
|
| |
| | | Oklahoma
| 89
| |
| Oklahoma
| 111
| |
| |
| Tulsa
| 86
| | |
| |
| |
| Primera ronda
| | | Segunda ronda
| | | Cuartos de final
| |
| | | | | | | | | | | | | | |
| |
| Colorado
| 71
| | |
| |
| Michigan
| 64
| | |
| | Colorado
| 83
| |
|
| |
| | | Wyoming
| 75
| |
| Wyoming
| 63
| |
| |
| Butler
| 61
| | |
| | | Colorado
| 81
| |
|
| |
| | | Arkansas State
| 75
| |
| Memphis
| 82
| | |
| |
| UAB
| 76
| | |
| | Memphis
| 57
| |
|
| |
| | | Arkansas State
| 58
| |
| Arkansas State
| 78
| |
| |
| Rice
| 71
| | |
| |
| |
| Primera ronda
| | | Segunda ronda
| | | Cuartos de final
| |
| | | | | | | | | | | | | | |
| |
| Massachusetts
| 93
| | |
| |
| La Salle
| 90
| | |
| | Massachusetts
| 78
| |
|
| |
| | | Fordham
| 74
| |
| Fordham
| 76
| |
| |
| South Florida
| 66
| | |
| | | Massachusetts
| 82
| |
|
| |
| | | Siena
| 80
| |
| South Carolina
| 69
| | |
| |
| George Washington
| 63
| | |
| | South Carolina
| 58
| |
|
| |
| | | Siena
| 63
| |
| Siena
| 90
| |
| |
| Fairleigh Dickinson
| 85
| | |
| |
| |
| Primera ronda
| | | Segunda ronda
| | | Cuartos de final
| |
| | | | | | | | | | | | | | |
| |
| Southern Illinois
| 75
| | |
| |
| Boise State
| 74
| | |
| | Southern Illinois
| 72
| |
|
| |
| | | SW Missouri State
| 69
| |
| SW Missouri State
| 57
| |
| |
| Coppin State
| 47
| | |
| | | Southern Illinois
| 68
| |
|
| |
| | | Stanford
| 78
| |
| Wisconsin
| 87
| | |
| |
| Bowling Green
| 79
| | |
| | Wisconsin
| 72
| |
|
| |
| | | Stanford
| 80
| |
| Stanford
| 93
| |
| |
| Houston
| 86
| | |
| |
| |
| Semifinales
| | | Final
| |
| | | | | | | | | |
|
| Oklahoma
| 88
| |
|
| Colorado
| 78
| |
| | Oklahoma
| 72
| |
|
| |
| | | Stanford
| 78
| |
| Massachusetts
| 71
| |
|
| Stanford
| 78
| |
|
|
| Tercer y cuarto puesto
| |
| | | | |
|
| Colorado
| 98
| |
|
| Massachusetts
| 91
| |
|
|
Mike Montgomery
Datos: Q4586985