Sir John Blackler Colton, KCMG (23 September 1823 – 6 February 1902) was an Australian politician, Premier of South Australia and philanthropist.

He arrived in South Australia in December 1839 aboard Duchess of Northumberland with his parents and siblings, who settled at McLaren Vale and started a vineyard.

[1] In 1859 Colton was elected a member of the Adelaide City Council, and on 17 November 1862 was returned to the South Australian House of Assembly for Noarlunga,[5] at the head of the poll.

The government, however, had succeeded in passing a liberalized crown lands consolidation bill, and a forward policy of public works in connexion with railways and water supply had been carried out.

He took a great interest in Prince Alfred College, and was its treasurer for many years, and was for a time chairman of the board of management of the Adelaide hospital.