William Harold Oliver (12 August 1891 – 15 November 1958) was an Australian rules footballer.
Harold Oliver was a key player to some of South Australian football's most successful teams.
He starred in South Australia's victorious 1911 Australian football championship along with Port Adelaide's 1914 "Invincible's" team.
After being close to retiring from the game after World War I he returned to captain both Port Adelaide to the 1921 SAFL premiership and South Australia in a game against Western Australia.
His reputation as an early exponent of the spectacular mark along with his general skill at playing the game saw him regarded as one of the best players South Australia has produced.
This is despite never having won the Magarey Medal, somewhat a result of his career being interrupted by World War I.