Big Hill is a bounded rural locality in Upper Lachlan Shire to the north of Marulan in the Southern Tablelands of New South Wales, Australia.

[1] The area is characterised with agricultural activities, predominantly grazing, as well as National Parks.

By the start of the 20th century, Big Hill boasted a Methodist chapel, school and a post office.

Today, only the church remains, and Arthursleigh operates as an agriculture research and teaching centre of the University of Sydney.

Big Hill is roughly equivalent to the cadastral parishes of Cookbundoon and Eden Forest in the county of Argyle.