The locality may take its name from the mountain Mount Stanley. Alternately, it may take its name from the pastoral leases called Mount Stanley. Mount Stanley East and Mount Stanley West were two of the six leases that comprised the pastoral run of
Colinton which was "bounded on the north by a marked tree beyond Mount Stanley". Colinton was taken up by the Balfour brothers (
John, Charles and Robert) in 1841. On 1 February 2018, Mount Stanley's postcode changed from 4306 to 4314. == Demographics ==