1939–40 National Hurling League
The 1939–40 National Hurling League was the 13th edition of the National Hurling League, which ran from 2 October 1939 until 7 April 1940.
The nine participating teams were Clare, Cork, Dublin, Galway, Kilkenny, Laois, Limerick, Tipperary and Waterford who were divided into two divisions. Two points awarded for a win and one point awarded for a drawn game..
Cork won the league, beating Tipperary by 8-9 to 6-4 in the final.
National Hurling League
Group A
| Pos | Team | Pld | W | D | L | Pts | Notes |
| 1 | Cork | 4 | 4 | 0 | 0 | 8 | National League champions |
| 2 | Kilkenny | 4 | 3 | 0 | 1 | 6 | - |
| 3 | Limerick | 4 | 2 | 0 | 2 | 4 | - |
| 4 | Waterford | 4 | 1 | 0 | 3 | 2 | - |
| 5 | Clare | 4 | 0 | 0 | 4 | 0 | - |
Group B
| Pos | Team | Pld | W | D | L | Pts | Notes |
| 1 | Tipperary | 3 | 3 | 0 | 0 | 6 | National League runners-up |
| 2 | Laois | 3 | 2 | 0 | 1 | 4 | - |
| 3 | Galway | 3 | 1 | 0 | 3 | 2 | - |
| 4 | Dublin | 3 | 0 | 0 | 3 | 0 | - |