Adjungbilly Shire was a local government area in the Riverina region of New South Wales, Australia.
Adjungbilly Shire was proclaimed on 7 March 1906. In 1910, the Shire was granted the powers of a municipality in respect to the South Gundagai urban area.
The shire was amalgamated with the Municipality of Gundagai to form Gundagai Shire on 1 January 1924.