William Ian Thomas (born 18 September 1950) is a former Australian politician.
He was born in Perth and was a union official and ministerial officer before entering politics.
In 1986 he was elected to the Western Australian Legislative Assembly as the Labor member for Welshpool, moving to Cockburn in 1989.
Following Labor's defeat in 1993 he was promoted to the front bench as Shadow Minister for Water Resources, Science and Technology and Energy, but he stepped down from the front bench in 1999 and retired from politics in 2001.
This article about an Australian Labor Party member of the Parliament of Western Australia is a stub.