William Locker (16 February 1866 – 15 August 1952) was an English footballer and cricketer. He played first-class cricket for Derbyshire between 1894 and 1903 and football for Stoke, Derby County and Notts County. He was one of nineteen sportsmen to achieve the Derbyshire Double of playing cricket for Derbyshire and football for Derby County. Locker was born in Long Eaton, Derbyshire, the son of William Locker and his wife Mary. His father was a lace maker and at the age of 15 Locker was a lace threader.