| North Dandalup Dam | |
|---|---|
 The dam seen from the northern lookout point | |
| Country | Australia |
| Coordinates | 32°31′03.61″S 116°00′59.04″E / 32.5176694°S 116.0164000°E |
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North Dandalup Dam is a dam in Western Australia. It is located 63.8 kilometres (39.6 mi) south of Perth in the Darling Scarp, which forms the western border of the Darling Ranges. Constructed in 1994, it was opened by the then state Premier Richard Court in October of that year. It was the final project in a dam-building scheme that also includes the Victoria and Conjurunjup Dams.
The dam, described by the Water Corporation as "a strategic source of public drinking water for the Integrated Water Supply System (IWSS)," provides water to Perth, Mandurah, Pinjarra, Harvey, the Goldfields and agricultural supply, and has in the past accounted for 10% of Perth's annual water supply.