Katoomba is the main town and council seat of the City of Blue Mountains in New South Wales, Australia, and is the administrative centre of Blue Mountains City Council.
Situated on the Great Western Highway and the Great Western Railway, Katoomba is home to the Three Sisters, 102Â km (63Â mi) by road west of Sydney Central Business District and 39Â km (24Â mi) south-east of Lithgow. Katoomba railway station serves the town. Katoomba is located on the lands of the Dharug and Gundungurra Aboriginal peoples.