It is served by Sydney Trains' T4 Eastern Suburbs & Illawarra Line services.

Allawah station opened on 25 October 1925 on the same date that the Illawarra line was duplicated.

[3] It consists of two island platforms with an overhead concourse and ticket office at the northern end.

The original brick station buildings were demolished in the 1990s and replaced by lighter passenger shelters.

In 2001, the station was upgraded with the provision of passenger lifts and expanded shelters.