Narromine Shire is a local government area in the Orana region of New South Wales, Australia. The Shire is located adjacent to the Mitchell Highway and the Main Western railway line. It was formed on 1 January 1981 from the amalgamation of the Municipality of Narromine and Timbrebongie Shire resulting from the Local Government Areas Amalgamation Act 1980. Narromine Shire includes the towns of Narromine, Trangie and Tomingley. The mayor of Narromine Shire Council is Cr.