| 2004 National League | |
| League: | National Leagues |
| Season: | National League One |
| Season Champs: | Leigh Centurions |
| Season Champ Name: | Champions |
| League Leaders: | Leigh Centurions |
| League Leaders Name: | League leaders |
| Promote: | Leigh Centurions |
| Promote From: | National League One |
| Relegate: | Keighley Cougars |
| Relegate To: | National League Two |
| Season2: | National League Two |
| League Leaders2: | Barrow Raiders |
| League Leaders Name2: | Champions |
| Promote2: | Barrow Raiders |
| Promote From2: | National League Two |
| Season3: | National League Three |
| Season Champs3: | Coventry Bears |
| Season Champ Name3: | Champions |
| League Leaders3: | Coventry Bears |
| League Leaders Name3: | League leaders |
| Prevseason Link: | 2003 Rugby League National Leagues |
| Prevseason Year: | 2003 |
| Nextseason Link: | 2005 Rugby League National Leagues |
| Nextseason Year: | 2005 |
The 2004 National Leagues (known as the LHF Healthplan National Leagues due to sponsorship)[1] are the second, third and fourth divisions of rugby league in the UK.
National League One was won by Leigh Centurions, and won promotion to the Super League after defeating runners-up Whitehaven in the play-off final. Keighley Cougars were relegated to National League Two.
National League Two was won by Barrow Raiders, and were automatically promoted to National League One. York City Knights reached the play-off final, but lost to Halifax, who retained their National League One status.
National League Three expanded to a 14-team league, but there was still no automatic promotion and relegation with National League Two. The league was won by Coventry Bears, who also went on to win the play-offs.
| Pos | Club | Pld | W | D | L | Pts for | Pts agst | Pts | Qualification |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coventry Bears | 20 | 17 | 0 | 3 | 831 | 385 | 34 | Play-offs |
| 2 | Bradford Dudley Hill | 20 | 16 | 0 | 4 | 942 | 317 | 32 | |
| 3 | Woolston Rovers (Warrington) | 20 | 15 | 1 | 4 | 764 | 232 | 31 | |
| 4 | Sheffield Hillsborough Hawks | 20 | 13 | 1 | 6 | 631 | 334 | 27 | |
| 5 | Bramley Buffaloes | 20 | 13 | 1 | 6 | 592 | 368 | 27 | |
| 6 | Hemel Stags | 20 | 13 | 0 | 7 | 721 | 424 | 26 | |
| 7 | St Albans Centurions | 20 | 13 | 0 | 7 | 724 | 406 | 26 | |
| 8 | Birmingham Bulldogs | 20 | 10 | 0 | 10 | 620 | 624 | 20 | |
| 9 | Underbank Rangers | 20 | 9 | 1 | 10 | 671 | 519 | 19 | |
| 10 | South London Storm | 20 | 8 | 2 | 10 | 496 | 510 | 18 | |
| 11 | Manchester Knights | 20 | 5 | 0 | 15 | 467 | 625 | 10 | |
| 12 | Carlisle Centurions | 20 | 3 | 0 | 17 | 290 | 498 | 6 | |
| 13 | Gateshead Storm | 20 | 2 | 0 | 18 | 290 | 1041 | 4 | |
| 14 | Essex Eels | 20 | 1 | 0 | 19 | 186 | 1492 | 2 |
Bradford Dudley Hill 13–30 St Albans Centurions
Coventry Bears 32–26 Birmingham Bulldogs
Sheffield Hillsborough Hawks 38–6 Bramley Buffaloes
Woolston Rovers (Warrington) 36–32 Hemel Stags
Sheffield Hillsborough Hawks 26–40 Bradford Dudley Hill
St Albans Centurions 18–26 Bramley Buffaloes
Coventry Bears 32–18 Bramley Buffaloes
Woolston Rovers (Warrington) 32–18 Bradford Dudley Hill
Coventry Bears 48–24 Woolston Rovers (Warrington)