The Thames Valley Rugby Football Union (TVRFU) is the governing body of rugby union in the region of Thames Valley in the North Island of New Zealand. Their senior representative team compete in the Heartland Championship. Thames Valley Rugby Football Union was founded in 1921 when it broke away from the now defunct South Auckland Rugby Football Union. The Thames Rugby Union, a sub-union that had remained affiliated with the Auckland Rugby Football Union, eventually joined the Thames Valley Union in 1951.