Boris Koytchou (1919 – 30 April 2006) was an American bridge player who played internationally both for France and North America. He was also a highly talented croquet player and a very successful rubber bridge player, mainly at the Regency Whist Club. Koytchou was one of the most popular players of his generation, and was that rarity in competitive bridge, a successful player about whom nobody had an unpleasant word to say. He came to the United States in 1953 and lived most of his life in Manhattan till his death in 2006.