The Shire of Kojonup is a local government area in the Great Southern region of Western Australia, about southeast of the state capital, Perth, along Albany Highway. The Shire covers an area of and its seat of government is the town of Kojonup.
The Kojonup Road District was created on 5 December 1871. On 1 July 1961, it became the Shire of Kojonup following the passage of the Local Government Act 1960, which reformed all remaining road districts into shires.
The Shire of Kojonup is located on the traditional land of the Kaniyang people of the Noongar nation.
The shire has no wards, and all councillors serve 4-year terms. Previously, it was divided into 5 wards:
(Note: The town of Ongerup, unrelated to the ward, is located within the Shire of Gnowangerup.)
The towns and localities of the Shire of Kojonup with population and size figures based on the most recent Australian census:
As of 2023, 91 places are heritage-listed in the Shire of Kojonup, of which three are on the State Register of Heritage Places, one of three being the Carrolup Native Settlement.