The most commonly known regionalisation is the governmental division of the state into regions for economic development purposes.
Others regionalisations include those made for purposes of land management, such as agriculture or conservation; information gathering, such as statistical or meteorological.
As a result, the names and boundaries of regions can vary and may overlap in popular places.
There are a great many different regionalisations, created for a range of purposes, including political, administrative, statistical and biological.
There are a range of other regionalisations of Australia, including: See also the Bureau of Meteorology's NSW regions map.