Churchman Brook Dam, Embankment dam in Perth region, Australia

Churchman Brook Dam is an earth-fill embankment dam about 30 km southeast of Perth in the City of Armadale. Its reservoir holds 2.24 gigalitres and draws from a 16-square-kilometre catchment. The dam stands 196 metres above sea level near Armadale, where savanna woodland surrounds the water.

Planning and construction of the dam began in 1923 in response to severe water shortages in the Perth metropolitan area. Its completion in 1929 marked a turning point in the region's water supply.

The City of Armadale added Churchman Brook Dam to its heritage list on 1 December 2008. The listing recognises the dam as part of the Hills Water Supply Scheme, which was announced in March 1923 by Premier James Mitchell to address severe water shortages in metropolitan Perth.

The dam lies about 30 km southeast of Perth in the City of Armadale, roughly 196 m above sea level. The surrounding area is savanna woodland with annual rainfall averaging 951 mm, heaviest in September and driest in February. Access is via the Armadale district; the nearest larger town is Armadale.

The reservoir forms part of a larger water system connecting multiple dams that secure the region's water supply. This infrastructure was added to Armadale's heritage list in 2008.