The National Provincial Championship, or NPC, was the predecessor to the current ITM Cup, Air New Zealand Cup and Heartland Championship in New Zealand rugby. 2005 was the 30th and final year of the National Provincial Championship, Auckland were the winners of Division 1, Hawke's Bay were the winners of Division 2, while Wairarapa Bush were the winners of Division 3.
Bye: Marlborough
Bye: East Coast
Bye: Wanganui