Mullion is a locality in the Southern Tablelands of New South Wales, Australia in the Yass Valley Shire.

It lies north-west of Canberra on the western side of the Murrumbidgee River.

[2][3] At the 2016 census, it had a population of 84.

[4] The locality is located in the Umburra parish of Cowley County, with a small part of it in Mullion parish, which lies further west.

This Southern Tablelands geography article is a stub.