Nimmitabel is a small town in the Monaro region in southeast New South Wales, Australia, in the Snowy Monaro Regional Council local government area. At the 2006 census, Nimmitabel had a population of 237.
The town is 37 kilometres (23 mi) south of Cooma and 75 kilometres (47 mi) west of Bega. Nimmitabel is on a stretch of highway shared between the Snowy Mountains Highway (HWY B72) and the Monaro Highway (HWY B23).
It is on the southern end of the Great Dividing Range, at the west of the Monaro Range, and lies 20 kilometres (12 mi) west of the Wadbilliga National Park.
Nimmitabel means "the place where many waters start or divide" in the local Aboriginal language. Many various spellings were adopted for the town, including: Nimmitybelle, Nimithybale, Nimitybell, Nimity Belle and Nimmitabel.
The area around Nimmitabel has the only true chernozem soil in Australia, a very rich, fertile and dark colored soil.