Tallong is a village within the Southern Tablelands region of New South Wales, Australia, in Goulburn-Mulwaree Council. The village is located just outside the southern extremity of the Southern Highlands region and has some cultural and historic connections with this region also. In the 2011 census, the village had a population of 715. The town is 8.5 km from the town of Marulan and 25 km from the town of Bundanoon.
The principal industries of the village include stud farms, arts and crafts and services for surrounding farms.
Tallong is home to the Tallong Midge Orchid (Genoplesium plumosum), a tiny flower found only in the area surrounding the town. This orchid is now a protected species. It was discovered in 1997.