Ian Lindsay Tuxworth (18 June 1942 – 21 January 2020) was an Australian politician, who was Chief Minister of the Northern Territory of Australia from 17 October 1984 until his resignation on 10 May 1986.^[1]

Tuxworth was born on 18 June 1942 in Wollongong, New South Wales, to Lindsay and historian Hilda Elsie Tuxworth, and moved with his family to Tennant Creek in 1951.^[2] He was educated at Tennant Creek Primary School, and Rostrevor College in Adelaide.

Before entering politics, Tuxworth, known affectionately as "Slim", started a soft drink factory in Tennant Creek, called Crystal Waters, with his father and brother Robert (Bob), which was later sold to Coca-Cola Amatil. Tuxworth also played baseball and was a member of the 1975 North Australian Kiewaldt team.^[3]

Tuxworth was elected as the Country Liberal Party (CLP) member for the electoral division of Barkly (which included Tennant Creek), in the Northern Territory Legislative Assembly at its inaugural election in 1974. As the representative for Barkly, Tuxworth was instrumental in facilitating the government support for the construction of the Mary Ann Dam, north of the town of Tennant Creek.^[4]

Following the resignation of Paul Everingham, Tuxworth was elected Chief Minister on 17 October 1984. In 1985, he opposed the federal government's transfer of the ownership of Uluru to its traditional owners, the Aṉangu people and boycotted the hand-over ceremony. However, 30 years later, he acknowledged the hand-back had been a success.^[5] He resigned as Chief Minister and from the CLP on 10 May 1986 to form the NT Nationals party^[1]

At the 1987 election Tuxworth was elected as the NT Nationals member for Barkly by 19 votes. His victory was annulled by the Court of Disputed Returns after a successful challenge from losing independent candidate Maggie Hickey. On 5 September 1987, he won a by-election, again defeating Hickey, who was then representing the Labor Party (ALP).^[6] After a redistribution turned Barkly into a nominally Labor-held seat, Tuxworth stood unsuccessfully for the seat of Goyder at the 1990 election.^[7]

Tuxworth became the first CLP leader not to lead the party to an election. Until Natasha Fyles' resignation in 2023, Tuxworth was the only Chief Minister who never faced an election.

Following his defeat, Tuxworth moved to Perth, Western Australia, where he died on 21 January 2020, aged 77. He was survived by his wife Ruth, children Sonia, Guy and Gemma, and eight grandchildren.^[8]