Walter Mapplebeck (19 July 1914 – 27 April 1992) was a New Zealand cricketer. He played in four first-class matches for Canterbury from 1936 to 1941. Mapplebeck was a fast-medium bowler who took 6 for 43 in the first innings in his debut match against Otago in the 1936-37 Plunket Shield. However, he did not play again until the 1940-41 season, when he played his other three matches. In his last match, against Wellington, he took 5 for 59 in the first innings. He served overseas as an officer in the Royal New Zealand Naval Volunteer Reserve in the Second World War.