Nature conservation

Biodiversity Reform

Sydney Basin Bioregion

The Sydney Basin Bioregion lies on the central east coast of NSW and covers an area of approximately 3,624,008 hectares (IBRA 5.1). It occupies about 4.53 per cent of NSW and is one of two bioregions contained wholly within the state. The bioregion extends from just north of Batemans Bay to Nelson Bay on the central coast, and almost as far west as Mudgee.

The bioregion is bordered to the north by the North Coast and Brigalow Belt South bioregions, to the south by the South East Corner Bioregion and to the west by the South Eastern Highlands and South Western Slopes bioregions.

As well as Sydney itself, the Sydney Basin Bioregion encompasses the towns of Wollongong, Nowra, Newcastle, Cessnock, Muswellbrook and Blue Mountains towns such as Katoomba and Mt Victoria.

It includes a significant proportion of the catchments of the Hawkesbury-Nepean, Hunter and Shoalhaven river systems, all of the smaller catchments of Lake Macquarie, Lake Illawarra, Hacking, Georges and Parramatta Rivers, and smaller portions of the headwaters of the Clyde and Macquarie rivers.


Sydney Basin - climate
See average climate figures for the bioregion.

Sydney Basin - landform
Get topography, geology, geomorphology, geodiversity and soil information.

Sydney Basin - biodiversity
Find out about plant communities, flora, fauna and wetlands in the bioregion.

Sydney Basin - regional history
Learn about Aboriginal cultural heritage in this area, together with the history of the region since colonisation.

Sydney Basin - bioregional-scale conservation
Find out how much of this bioregion is protected by parks and reserves, and learn about other conservation programs in the region.

Sydney Basin - subregions
Get basic information about the finer-scale subregions that make up this bioregion.

Sydney Basin - references
See a list of publications and websites which can provide more information about this bioregion.

Sydney Basin - maps and printable versions
Download and print all the information in this bioregion overview as an Acrobat (PDF) document. View maps showing rivers, topography, vegetation, conservation reserves and subregions.

Page last updated: 18 April 2016