 In the 2001 Census , the population of the Waterfall Gully census area ( which includes the suburbs of Glen Osmond , <unk> Gardens and Mount Osmond ) was 2 @,@ 497 people , in an area of 6 @.@ 08 square kilometers . Females outnumbered males 54 @.@ 2 % to 45 @.@ 8 % , and some 21 @.@ 4 % of the population was born overseas ( see chart for a breakdown ) . There was only a slight change in the 2006 census , with the population increasing by 25 to 2 @,@ 522 . 
