Mount Henry Peninsula is a land feature and reserve located south of Perth, Western Australia, on the north bank of the Canning River near the Mount Henry Bridge in Salter Point, Western Australia. It covers , and includes both Banksia attenuata and Banksia menziesii woodland, and a muddy and desert biome. The peninsula features limestone slopes, shoreline vegetation, wetlands, and contains the most inland vegetated knoll of the Spearwood dunes on the Swan-Canning estuary, as well as a significant variety of natural conditions for birds and other fauna. The Mount Henry Peninisula is a designated Bush Forever Site, number 227.