It is bordered to the west by Farmborough, Cordeaux Heights and Farmborough Heights in the Mount Kembla foothills, the north by Figtree, the east by Berkeley and Flagstaff Hill, site of the Nan Tien Temple, and the south by Kembla Grange.

The Immaculate Conception Catholic Church was opened in 1954 and subsequently extended in 1997 and is located at 48 Princes Highway, Unanderra.

Unanderra has several local attractions including an old school building, several historic houses and a community centre.

The suburb lies on the Illawarra coastal plain, with its west border in the lower foothills of Mount Kembla.

From the late 19th century Unanderra served as a gateway to the Sydney Municipal markets for produce (apples, beans, peas, milk) from the surrounding area as well as South Kembla, Cordeaux Valley and as far away as Goondarrin.