Situated 15km from Perth GPO.

The area of this suburb was first named "Buckland Downs" on a map of the Colony drawn in London in September 1832. This name is thought to have been bestowed by Governor Stirling to honour William Buckland, a noted geologist and later Dean of Westminster. When the suburb was first developed it was referred to as Buckland Hill, but in 1907 when the Public Works Department constructed a jetty on the river here, the area was named Mosman Bay after Mosman in Sydney, the birthplace of R J Yeldon, one of the Road Board members. The area name was changed to Mosman Park at a meeting of the Executive Council in 1937.