The Shire is governed and administered by the Yarriambiack Shire Council; its seat of local government and administrative centre is located at the council headquarters in Warracknabeal, it also has service centres located in Hopetoun and Rupanyup. The Shire is named after Yarriambiack Creek, a geographical feature that meanders through the LGA from the Wimmera River, through Warracknabeal, to Lake Coorong at Hopetoun.
The council is composed of three wards and seven councillors, with three councillors elected to represent the Warracknabeal Ward and two councillors per remaining ward elected to represent each of the other wards.
The council meets in the council chambers at the council headquarters in the Warracknabeal Municipal Offices, which is also the location of the council's administrative activities. It also provides customer services at both its administrative centre in Warracknabeal, and its service centres in Hopetoun and Rupanyup.
^ abVictoria Government Gazette – Online Archive (1837–1997). Order estg (Part 16) the Shire of Yarriambiack. "S4 of 1995". State Library of Victoria. State Government of Victoria (published 20 January 1995). p. 6. Retrieved 10 January 2014.
^Local Government in Victoria. "Yarriambiack Shire Council". Department of Transport, Planning and Local Infrastructure. State Government of Victoria. Retrieved 10 January 2014.