John Thomas Campbell (1770–1830) was a public servant and politician in the New South Wales Legislative Council during the early Australian colonial period.
[1] After arriving in Sydney, Campbell, on 1 January 1810 was appointed to the role of vice-regal secretary to Governor Lachlan Macquarie.
[2] For eleven years he was Macquarie's chief assistant in the administration of the colony, his intimate friend and loyal supporter.
[2] Campbell took a leading part in the founding of the Bank of New South Wales from 1816 until 1817 and was appointed as the first president of the Board of Directors, serving until 1821.
In April 1827, Darling appointed him collector of customs as well, in place of John Piper, at a salary of £1200, but he resigned from this post in December.