Saint Marys Bay is a suburb which lies within the Territorial Authority of Auckland, one of 269 residential suburbs which form the wider region. Saint Marys Bay is the 166th largest suburb of Auckland in terms of the total number of residential housing stock. Saint Marys Bay provides a range of housing stock, with the earliest residential housing recorded in the area constructed between 1860 - 1869. The majority of the residential housing stock in the locality was constructed between 1900 - 1909. Residential housing stock in Saint Marys Bay is made up of approximately 94% residential housing and 6% residential investment housing properties.