The Canterbury Rugby Football Union (also referred to as "Canterbury" or "CRFU") is the governing body for rugby union in a portion of the Canterbury region of New Zealand. Its colours are red and black in a hooped design. The CRFU govern the running of the Canterbury representative team which have won New Zealand's first-tier domestic competition National Provincial Championship (Air New Zealand Cup and ITM Cup) 14 times including a "six-peat" from 2008 to 2013 – with five in the National Provincial Championship, two in the Air New Zealand Cup, five in the ITM Cup and one in the Mitre 10 Cup. Their most recent victory was the 2017 Mitre 10 Cup. Canterbury also acts as a primary feeder to the Crusaders, who play in the Super Rugby competition.

The union also administers all club rugby within the region, including senior club rugby and school rugby. Canterbury has a proud history producing All Blacks, the most of any New Zealand region, with Scott Barrett becoming Canterbury's 200th All Black.