Tiaro Shire was first established on 9 Feb 1884 from part of Tiaro Division but this Shire was abolished and the area returned to the Division on 16 Dec 1886. Tiaro Shire was subsequently established on 31 Mar 1903 whenTiaro Divisional Board became Tiaro Shire Council under the "Local Authorities Act 1902".
Under the "Local Authorities Act 1902", the primary function of Shire Councils was to provide such public services and amenities as parks and reserves, cemeteries, libraries and recreational facilities, water and sanitation services, roads, bridges, wharves, street lighting, public health services (such as immunisations), licences and registrations for businesses, markets and animals, town planning, and the control of noxious weeds and other pests.
The Council was also responsible for administering the Local Fund, and for valuing properties within the Shire for the purpose of determining and collecting rates.
The Council could pass by-laws regarding all matters within its jurisdiction. All such by-laws required the assent of the Governor-in-Council.
The Shire Council included a chairman, town clerk and a number of other members. From time to time, the Council could appoint committees for special or general purposes. Council also appointed its own officers, who were paid from the Local Fund.
Each year the Minister appointed an independent auditor to review the financial statements of the Council. The Council submitted an Annual Statement of Revenue and Expenditure to the Minister, which was published in the Government Gazette.
On 15 March 2008, Divisions 1 and 2 of Tiaro Shire amalgamated with Maryborough City and Hervery Bay City and Woocoo Shire to form the Fraser Region, and Division 3 amalgamated with Cooloola and Kilkivan Shires to form the Gympie Region.
Fraser Region: Divisions 1 and 2: (northern areas: Division 1 - the area north of Ooramera Creek, Redbank Road and Tahiti Road, including the Town of Tiaro and the areas of Antigua, Mungar, Owanyilla, Pilerwa, Pioneers Rest, St Mary, and Thinoomba; Division 2 - the areas of Bauple, Bauple Forrest, Glenwood, Gootchie, Gundiah, Glenbar, Kanigan, Mount Urah, Munna Creek, Netherby, Paterson, Talegalla and Tinnanbar).
Gympie Region: Division 3: (Theebine/Gunalda areas - the area generally south of Blowers Road, Wards Road and Ularrah Creek, including Anderleigh, Curra, Glen Echo, Gunalda, Miva Neerdie, Scotchy Pocket and Theebine).