Gurrundah is a locality in the Upper Lachlan Shire, New South Wales, Australia. It lies on the eastern side of the CrookwellâÂÂGunning road about 22 km south of Crookwell and 26 km north of Gunning. At the , it had a population of 55. The Gullen Range Wind Farm lies in the east of the locality above the upper Wollondilly River.