1990–91 National Hurling League
The 1990–91 National Hurling League was the 60th season of the National Hurling League, the top league for inter-county hurling teams, since its establishment in 1925. The season began on 14 October 1990 and concluded on 12 May 1991.
Kilkenny came into the season as defending champions of the 1989-90 season. Clare and Waterford entered Division 1 as the two promoted teams.
On 12 May 1991, Offaly won the title after a 2-6 to 0-10 win over Wexford. It was their first league title ever.
Dublin were the first team to be relegated after losing all of their group stage games, while Clare suffered the same fate.
Division 1
Table
| Pos | Team | Pld | W | D | L | Pts | Notes |
| 1 | Wexford | 7 | 6 | 0 | 1 | 12 | National League runners-up |
| 2 | Tipperary | 7 | 5 | 0 | 2 | 10 | |
| 3 | Waterford | 7 | 4 | 1 | 2 | 9 | |
| 4 | Kilkenny | 7 | 4 | 0 | 3 | 8 | |
| 5 | Cork | 7 | 3 | 1 | 3 | 7 | |
| 6 | Limerick | 7 | 3 | 0 | 4 | 6 | |
| 7 | Clare | 7 | 1 | 2 | 4 | 4 | Relegated |
| 8 | Dublin | 7 | 0 | 0 | 7 | 0 | Relegated |
Group stage
Knock-out stage
Quarter-finalsSemi-finals
Final
Top scorers
;Top scorers overall| Rank | Player | Team | Tally | Total | Matches | Average |
| 1 | Jimmy Holohan | Wexford | 6-54 | 72 | 10 | 7.20 |
| 2 | Kieran Delahunty | Waterford | 2-39 | 45 | ||
| 3 | Kieran Hetherington | Dublin | 2-29 | 35 | 7 | 5.00 |
| 4 | Eamon Morrissey | Kilkenny | 5-17 | 32 | ||
| 5 | D. J. Carey | Kilkenny | 3-23 | 31 | 4 | 7.75 |
| 6 | Conor Stakelum | Tipperary | 1-25 | 28 | ||
| 7 | Anthony Prendergast | Kilkenny | 2-21 | 27 | ||
| 8 | Martin Storey | Wexford | 1-23 | 26 | ||
| 8 | Michael Cleary | Tipperary | 0-26 | 26 | ||
| 9 | Ger FitzGerald | Cork | 6-07 | 25 |
;Top scorers in a single game
| Rank | Player | Team | Tally | Total | Opposition |
| 1 | D. J. Carey | Kilkenny | 2-05 | 11 | Galway |
| 1 | D. J. Carey | Kilkenny | 1-08 | 11 | Tipperary |
| 2 | Jimmy Holohan | Wexford | 1-07 | 10 | Cork |
| 2 | Jimmy Holohan | Wexford | 1-07 | 10 | Kilkenny |
| 3 | Kieran Delahunty | Waterford | 1-06 | 9 | Limerick |
| 3 | Kieran Hetherington | Dublin | 0-09 | 9 | Kilkenny |
| 3 | Michael Cleary | Tipperary | 0-09 | 9 | Dublin |
| 3 | Anthony Prendergast | Kilkenny | 0-09 | 9 | Cork |
| 3 | Jimmy Holohan | Wexford | 0-09 | 9 | Dublin |
| 4 | Ger FitzGerald | Cork | 2-02 | 8 | Limerick |
| 4 | Jimmy Holohan | Wexford | 1-05 | 8 | Tipperary |
| 4 | Kieran Delahunty | Waterford | 1-05 | 8 | Dublin |
| 4 | Kieran Delahunty | Waterford | 0-08 | 8 | Clare |
| 4 | Kieran Hetherington | Dublin | 0-08 | 8 | Wexford |
| 4 | Tony O'Sullivan | Cork | 0-08 | 8 | Dublin |
| 4 | Ray Heffernan | Kilkenny | 0-08 | 8 | Waterford |
| 4 | Cyril Lyons | Clare | 0-08 | 8 | Dublin |
Division 2
Table
| Pos | Team | Pld | W | D | L | Pts | Notes |
| 1 | Galway | 7 | 7 | 0 | 0 | 14 | |
| 2 | Down | 7 | 5 | 0 | 2 | 10 | |
| 3 | Offaly | 7 | 5 | 0 | 2 | 10 | National League champions |
| 4 | Kerry | 7 | 3 | 0 | 4 | 6 | |
| 5 | Antrim | 7 | 3 | 0 | 4 | 6 | |
| 6 | Laois | 6 | 3 | 0 | 3 | 6 | |
| 7 | Meath | 7 | 1 | 0 | 6 | 2 | Relegated |
| 8 | Derry | 6 | 0 | 0 | 6 | 0 | Relegated |