John Colton, English-Australian politician, 13th Premier of South Australia (died 1902)

Sir John Blackler Colton, was an Australian politician, Premier of South Australia and philanthropist. His middle name, Blackler, was used only rarely, as on the birth certificate of his first son.

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.