John Cockburn, Scottish-Australian politician, 18th Premier of South Australia (died 1929)

Sir John Alexander Cockburn was Premier of South Australia from 27 June 1889 to 18 August 1890.

The Premier of South Australia is the head of government in the Australian state of South Australia. The Government of South Australia follows the Westminster system, with the Parliament of South Australia acting as the legislature. The Premier is appointed by the Governor of South Australia, and by modern convention holds office by virtue of their ability to command the support of a majority of members of the lower house of Parliament, the House of Assembly.