Narrabri Shire Council is composed of twelve Councillors elected proportionally as a single ward. 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 held on 8 September 2012, and the makeup of the Council is as follows:
A referendum was held on 8 September 2012 and an absolute majority of voters resolved in favour to reduce the number of Councillors from twelve to nine. The change will take effect at the next elections, due to be held in September 2016.