Scarborough Sandstone is a geologic formation in the Sydney Basin in eastern Australia.

Commonly seen in the Illawarra region, this stratum is up to 26 metres thick.

Formed in the early Triassic, it is part of the Narrabeen Group of sedimentary rocks.

This formation includes quartz-lithic sandstone, sometimes with pebbles.

This article about a specific Australian geological feature is a stub.