William Cunningham (8 July 1874 – 3 September 1927) was a New Zealand rugby union player who represented New Zealand—known as the All Blacks—between 1901 and 1908. Most notably he toured with the Original All Blacks on their 1905–06 tour of the British Isles, France and North America. They were the first New Zealand representative team to visit the British Isles, and of their 32 matches there Cunningham played in 23. He played mainly at lock, and was added to the touring party due to his strong scrummaging ability. He played in three Test matches during the trip: against Scotland, Ireland and France, but did not play in the loss to Wales due to injury, the All Blacks' only defeat on tour.