Yallambie is a residential suburb stretched between Greensborough Road to the west and the Plenty River on its east. Its southern border is Lower Plenty Road and Yallambie Road in the north.
Yallambie's residential population almost doubled when a large parcel of reserved land behind the barracks was converted to residential use following rationalisation of military facilities during the late 1980s.
Yallambie is also home to the federal government agency Australian Radiation Protection & Nuclear Safety Agency (ARPANSA).
At the 2006 census, it had a population of 4267.