| Year: | 1939–40 |
| Record: | 9–9 |
| Sport: | Basketball |
| Conference: | Big Six Conference |
| Short Conf: | Big Six |
| Team: | Iowa State Cyclones |
| Head Coach: | Louis Menze |
| Conf Record: | 2–8 |
| Hc Year: | 12th |
| Stadium: | State Gymnasium |
The 1939–40 Iowa State Cyclones men's basketball team represented Iowa State University during the 1939-40 NCAA College men's basketball season. The Cyclones were coached by Louis Menze, who was in his twelfth season with the Cyclones. They played their home games at the State Gymnasium in Ames, Iowa.
They finished the season 9–9, 2–8 in Big Six play to finish in a tie for fourth place.
|-!colspan=6 style=""|Regular Season|-[2]