The Shire of Mullewa was a local government area in the Mid West region of Western Australia, about 100 kilometres (62 mi) east of the city of Geraldton and about 450 kilometres (280 mi) north of the state capital, Perth.

The Shire covered an area of 10,827 square kilometres (4,180 sq mi), and its seat of government was the town of Mullewa.

The Mullewa Road District was constituted on 11 August 1911, and on 1 July 1961, it became a shire under the Local Government Act 1960.

[2] Throughout 2010 and 2011, negotiations were held between the City of Geraldton-Greenough and the Shire of Mullewa as to whether the two entities should merge.

The merger was approved by the Local Government Advisory Board in December 2010.