William Trezise Eddy (1864 – 11 February 1926) was an Australian businessman and politician who was a member of the Legislative Assembly of Western Australia from 1905 to 1908, representing the seat of Coolgardie.
He moved to Coolgardie, Western Australia, in 1894, in the early days of the gold rush, and set up as a storekeeper.
He also stood unsuccessfully at the 1904 state election, losing to Henry Ellis.
[7] A by-election was held in July 1906, at which Eddy increased his margin to 100 votes.
[6] After leaving politics, Eddy worked as an auctioneer, initially in Coolgardie and then from 1913 based in Merredin.