Donald Lacey Priestley (né Priestlay; 28 July 1887 – 30 October 1917) was an English cricketer who played for Gloucestershire County Cricket Club from 1909 to 1910. He made his debut in the County Championship against Sussex at the County Ground, Hove. In May 1910, he scored fifty-one runs against Hampshire at the County Ground, Southampton. His final first class appearance for Gloucestershire was against Worcestershire at the War Memorial Ground, Stourbridge.