| Type: | NAIA men's basketball tournament |
| Year: | 1940 |
| Teams: | 32 |
| Fabfourarena: | Municipal Auditorium |
| Fabfourcity: | Kansas City, Missouri |
| Champions: | Tarkio |
| Titlecount: | 1st |
| Champgamecount: | 1st |
| Champffcount: | 1st |
| Runnerffcount: | 2nd |
| Runnerup: | San Diego State |
| Gamecount: | 2nd |
| Semifinal1: | Delta State |
| Finalfourcount1: | 1st |
| Semifinal2: | Hamline |
| Finalfourcount2: | 1st |
| Mvp: | Mel Waits |
| Mvpteam: | Tarkio |
| Attendance: | unknown |
The 1940 NAIA men's basketball tournament was held in March at Municipal Auditorium in Kansas City, Missouri. The 4th annual NAIA basketball tournament featured 32 teams playing in a single-elimination format.[1]
This year the National College Basketball Tournament (NCBT) changed its name to the National Association for Intercollegiate Basketball (NAIB).[2]
The championship game featured Tarkio beating San Diego State, 52–42. San Diego State became the first team to lose back-to-back title games.
Many of the records set by the 1940 tournament have been broken, and many of the awards were established much later: