William Henry Willshire (10 March 1852 – 22 August 1925) was an Australian police officer who worked in Alice Springs in the Northern Territory of Australia.

He was the first police officer to be charged for murder in Australian history, after killing a group of Aboriginal people at Tempe Downs Station.

By 1883, he was promoted to first-class mounted constable, and then took charge of a native police force consisting of six men, investigating incidents such as cattle spearing.

Public subscriptions raised £2,000 (equivalent to $310,000 in 2022) for Willshire's bail and paid for his defence by John Downer, a prominent barrister and former premier of the colony.

[7] After the trial, Willshire was transferred to the Victoria River district in 1893 but was permanently removed from the position in 1895 for fear of further controversies and returned to Adelaide.