Louis Koen, South African rugby player
Louis Johannes Koen (born 7 July 1975 in Cape Town, South Africa) is a South-African rugby union player who played for the Springboks, until 2003, when he moved abroad following the World Cup.

Effective at either fly half or full back, his career began with Western Province, before his move to the Lions and later the Bulls. He was part of the Western Province team that won the Currie Cup in 1997, contributing immensely with his accurate goal kicking. It was this dependable boot that led to his recall to the Springbok team in 2003 after a two-year absence, but following South Africa's disappointing exit in the quarter-finals, Koen was signed by Narbonne in France. After two years dogged by injury, Koen moved back to Western province as only the second full-time kicking coach in South Africa. At only 29 it was reputed that Koen may consider a return to playing, but a year into his contract he has yet to pull on the famous blue and white hoops, and his talents are now most likely to be utilised developing the young and talented Peter Grant. In 2010 he was recalled out of retirement to play one Currie Cup First Division match for the Boland Cavaliers against the Valke.