2004 Rugby League National Leagues

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.

York City Knights reached the play-off final, but lost to Halifax, who retained their National League One status.

The league was won by Coventry Bears, who also went on to win the play-offs.

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)