| Mode: | Basketball |
| Year: | 1940–41 |
| Prev Year: | 1939–40 |
| Next Year: | 1941–42 |
| Team: | Long Island Blackbirds |
| Conference: | Independent |
| Record: | 25–2 |
| Hc Year: | 10th |
| Champion: | National Invitation Tournament Champions Premo-Porretta National Champions |
The 1940–41 Long Island Blackbirds men's basketball team represented Long Island University during the 1940–41 NCAA men's basketball season in the United States. The head coach was Clair Bee, coaching in his tenth season with the Blackbirds.[1] The team finished the season with a 25–2 record[2] and was retroactively named the national champion by the Premo-Porretta Power Poll.[3] They won the 1941 National Invitation Tournament (NIT) as well—their second NIT championship in three seasons—going 3–0 in the tournament and defeating Ohio in the championship game.