Kenneth 'Monkey' Sellar (11 August 1906 – 15 May 1989) was an English sportsman who represented the England national rugby union team and played first-class cricket for Sussex. As a right-handed specialist batsman, Sellar appeared in 19 first-class matches and made 616 runs at 19.87. Many of those matches were with Sussex but he also played for the Royal Navy Cricket Club. He made just one century in his career, an innings of 119 in a County Championship match against Somerset in Hove.