Wollondilly Shire

Wollondilly Shire New South Wales
Location in Outer Metropolitan Sydney
Coordinates	34°11′S 150°36′E / 34.183°S 150.600°E / -34.183; 150.600
Population	53,961 (LGA 2021)[1]
Established	7 March 1906
Area	2,560 km2 (988.4 sq mi)
Mayor	Matt Gould
Council seat	Picton[2]
Region	Macarthur Blue Mountains Central Tablelands Greater Western Sydney
State electorate(s)	Wollondilly
Federal division(s)	Hume Cunningham
Website	Wollondilly Shire
LGAs around Wollondilly Shire: Blue Mountains Penrith Camden Oberon Wollondilly Shire Campbelltown Upper Lachlan Wingecarribee Wollongong

Wollondilly Shire is a periurban local government area, located on the south west fringe of the Greater Sydney area in New South Wales, Australia, parts of which fall into the Macarthur, Blue Mountains and Central Tablelands regions in the state of New South Wales, Australia. Wollondilly is seen as the transition between Regional NSW and the Greater Sydney Region, and is variously categorised as part of both. Wollondilly Shire was created by proclamation in the NSW Government Gazette on 7 March 1906, following the passing of the Local Government (Shires) Act 1905, and amalgamated with the Municipality of Picton on 1 May 1940.

Wollondilly Shire is named after the Wollondilly River. The area is traversed by the Hume Highway and the Southern Highlands railway line. Wollondilly Shire contains several small towns and villages broken up by farms and sandstone gorges. To its west is wilderness and includes the Nattai Wilderness and the Burragorang Valley. The majority of the Shire is either national park or forms part of the water catchment for Sydney's water supply. The Shire provides 97% of Sydney's water supply.

The Mayor of Wollondilly Shire is Cr. Matt Gould, an independent politician.