Halifax RLFC (known as Halifax Blue Sox from 1996–2002) is a semi-professional rugby league club in Halifax, West Yorkshire, which formed in 1873. Halifax were one of the original twenty-two rugby clubs that formed the Northern Rugby Football Union in 1895. They have been Rugby League Champions four times and have won the Challenge Cup five times. They have rivalries with neighbours Bradford and Huddersfield and with fellow Championship side Featherstone Rovers.