Conargo Shire was established in 1907. In 2001 the former Windouran shire was absorbed into Conargo Shire. This amalgamation resulted in an additional 5,090 square kilometres (1,970 sq mi) and another 387 residents. It is divided into four wards, and contains six villages - Conargo, Blighty, Mayrung, Pretty Pine, Wanganella and Booroorban.
Before mergers in recent decades it was a common in New South Wales for rural shires to have their offices in an adjacent rural municipality (rural town). The only surviving case is Conargo Shire Council's offices in Deniliquin.
The mayor of Conargo Shire Council is Norm Brennan.
Conargo Shire Council is composed of eight councillors elected proportionally as four separate wards, each electing two councillors. All councillors are elected for a fixed four-year term of office. The mayor is elected by the councillors at the first meeting of the Council. The most recent election was due to held on 8 September 2012. However, only eight candidates, being the below, nominated for election. There being no additional candidates, the election was uncontested. The makeup of the council is as follows: