Denman Shire was proclaimed (as Wybong Shire) on 7 March 1906, one of 134 shires created after the passing of the Local Government (Shires) Act 1905.[1] It was renamed Muswellbrook Shire on 6 March 1907.[2] It was not until 10 April 1968 that the area was renamed Denman Shire.[3]