Thomas Duff (7 April 1870 – 6 June 1949) was an Australian businessman and politician who was a Nationalist Party member of the Legislative Assembly of Western Australia from 1918 to 1921.
He arrived in Western Australia in 1890, initially living in Perth and then moving to Kalgoorlie in 1893 during the gold rush.
[1] At the 1917 state election, Duff contested the seat of Avon, but was defeated by Tom Harrison of the Country Party.
He moved to Cottesloe (a suburb of Perth) later in the year, and made a second run for parliament at the 1918 Claremont by-election, finishing with 54.3 percent of the two-party-preferred vote.
Duff did not re contest Claremont at the 1921 state election,[2] and subsequently returned to Merredin.