Couridjah is a small town in the Macarthur Region of New South Wales, Australia, in Wollondilly Shire.

[1] The name "Couridjah" has been variously reported to mean, in a local Aboriginal language, anything from "The Place of the White Ants" to "The Home of the Medicine Man".

Thirlmere Lakes, to the west of the station, supplied water to the standpipes at Couridjah for replenishing steam locomotives, after their long haul up the steep grade from Picton.

Couridjah has a number of heritage-listed sites, including: The platform and the small waiting room have been restored and are maintained by volunteers from the NSW Rail Museum at Thirlmere, though none of the Heritage trains which still use sections of the Picton Loop line stops there.

The main premises of the Tharawal Local Aboriginal Land Council are located at Couridjah.