The Shire of Wagin is a local government area in the Wheatbelt region of Western Australia, about 230 kilometres (143 mi) southeast of the state capital, Perth. The Shire covers an area of about 1,948 square kilometres (752 sq mi), and its seat of government is the town of Wagin.

It was first established as the Arthur Road District on 10 February 1887. It was renamed the Wagin Road District on 10 February 1905.^[2]

The Wagin township was severed from the road district as the Municipality of Wagin on 27 July 1906,^[3] but was amalgamated back into the road district on 15 April 1961, with the creation of a new Town Ward.^[2]

It was declared a shire and named the Shire of Wagin with effect from 1 July 1961 following the passage of the Local Government Act 1960, which reformed all remaining road districts into shires.^[2]

The shire was divided into wards until 1991, but wards were abolished and councillors now sit at large. As of 2014^[update] there were 11 councillors.

The towns and localities of the Shire of Wagin with population and size figures based on the most recent Australian census:^[4][5]

• Charles Piesse, Arthur Roads Board chairman 1887–1890; later a state MP
• Winifred Piesse, Shire of Wagin councillor 1971–1977; later a state MP

As of 2023, 92 places are heritage-listed in the Shire of Wagin,^[17] of which eight are on the State Register of Heritage Places.^[18]