Gwydir Shire is a local government area located in the New England region of New South Wales, Australia.

The northern boundary of the Shire is located adjacent to the border between New South Wales and Queensland.

The towns of Gwydir Shire include Warialda and Bingara, and the villages/localities include Back Creek, Bangheet, Caroda, Cobbadah, Coolatai, Copeton, Crooble, Croppa Creek, Dinoga, Elcombe, Gineroi, Gravesend, Gulf Creek, Gundamulda, North Star, Pallal, Riverview, Upper Bingara, Upper Horton, Warialda Rail, Yagobe, and Yallaroi.

Yallaroi and Bingara were fully amalgamated into the newly formed Gwydir Shire, while Barraba was split between Gwydir, which received 1,259.1 square kilometres (486.1 sq mi) (41%) of its area and 340 people in the former shire's north, and the newly formed Tamworth Regional Council.

Using the Australian Bureau of Statistics' time series data and census collection district figures for 2006, this component had a population of 591 in 1996, 447 in 2001 and 340 in 2006.

Gwydir Shire Council is made up of nine councillors elected proportionally as a single ward.