William Caffyn (2 February 1828 – 28 August 1919), known as Billy Caffyn, was an English cricketer who played mainly for Surrey County Cricket Club and various England representative sides. Caffyn was born in Reigate in Surrey in 1828 and died in 1919 aged 91 in the town. He made five appearances for New South Wales, two for Kent and one for Lancashire as well as appearing five times for MCC.
Caffyn was a genuine all-rounder being a sound middle order right-handed batsman and a very effective rightarm medium fast roundarm bowler. He played a major part in the success of Surrey during the 1850s.
Caffyn's known first-class career spanned the 1849 to 1873 seasons. He took 602 wickets in 200 matches at an average of 13.47 runs each with a best analysis of 9/29. He took five wickets in an innings 49 times and 10 wickets in an innings 11 times. He scored 5885 runs at an average of 17.99 with a highest score of 103, making 2 centuries. He took 149 catches. In 1860 whilst employed as a professional at Winchester College he played and beat an XI of the Town of Winchester single handed by 28 runs. Caffyn made scores of 35 and 1, and with two men fielding for him he bowled out the opposition for 4 and 4.
At the end of the 1859 English cricket season, Caffyn was one of the 12 players who took part in cricket's first-ever overseas tour when an England cricket team led by George Parr visited North America.
Caffyn was instrumental in the early development of Australian cricket and the establishment of Anglo-Australian competition. Known in England as the Surrey Pet, he came to Australia with a sponsored 1861/62 team which consisted of mainly Surrey cricketers, and again in 1864 after which he stayed on as coach of the Melbourne Cricket Club.