Fullerton is a locality within the Upper Lachlan Shire of New South Wales, Australia.

[1] At the 2016 census, Fullerton had a population of 48.

[2] The locality's north eastern border is defined by the Abercrombie River, and its eastern border is defined by the Bolong River, which comes to a confluence with the Abercrombie River.

[3] These rivers are part of the Lachlan catchment, in the Murray-Darling Basin.

[4] The main road running through Fullerton is Fullerton Road, which comes to a junction with Peelwood Road to the south, with the latter continuing on to Crookwell.