John Tonkin, Australian politician, 20th Premier of Western Australia (b. 1902)
John Trezise Tonkin AC (2 February 1902 – 20 October 1995), popularly known as "Honest John", was an Australian politician.

A member of the Labor Party, he served as a Member of the Western Australian Legislative Assembly for a record 44 years from 1933 to 1977, and was the 20th Premier of Western Australia, serving from the 1971 election, where his party defeated the ruling Liberal–Country coalition led by David Brand, to the 1974 election, where the Labor Party was defeated by the Liberal–Country coalition led by Charles Court. A number of landmarks were later named or renamed after him, including the Tonkin Highway and John Tonkin College in Mandurah.