This page discusses the rivers and hydrography of the state of New South Wales, Australia.
[1] Due to the relatively close proximity of the Great Dividing Range to the eastern coast of New South Wales, in general, the coastal rivers are short, navigable only in their lowest reaches, if at all, and subject to flooding in periods of high rainfall.
On all of the significant inland rivers, large dams have been constructed to regulate the water flow, to facilitate irrigation, and in some cases, to generate hydro-power.
For administrative purposes, the rivers are generally grouped into four major catchments defined by their drainage basin, and then a series of sub-catchments.
In the northern half of the state, a series of rivers rise on the western side of the Great Dividing Range.