At the, there were 34,430 people in the Great Lakes Council local government area, of these 49.0 per cent were male and 51.0 per cent were female. Aboriginal and Torres Strait Islander people made up 3.8 per cent of the population, which was higher than the national and state averages of 2.5 per cent. The median age of people in the Great Lakes Council area was 52 years, significantly higher than the national median of 37 years; and the highest median of any local government area in New South Wales. Children aged 0 – 14 years made up 15.4 per cent of the population; and people aged 65 years and over made up 30.6 per cent of the population, with the latter significantly influencing the median age. Of people in the area aged 15 years and over, 52.4 per cent were married and 15.0 per cent were either divorced or separated. Population growth in the Great Lakes Council between the 2001 census and the 2006 census was 4.00 per cent; and in the subsequent five years to the 2011 census, population growth was 5.08 per cent. When compared with total population growth of Australia for the same periods, being 5.78 per cent and 8.32 per cent respectively, population growth in the Great Lakes Council local government area was significantly lower than the national average. The median weekly income for residents within the Great Lakes Council area was nearly half the national average. At the 2011 census, the proportion of residents in the Great Lakes Council local government area who stated their ancestry as Australian or Anglo-Saxon exceeded 82 per cent of all residents. In excess of 66% of all residents in the Great Lakes Council area nominated a religious affiliation with Christianity at the 2011 census, which was significantly higher than the national average of 50.2 per cent. Meanwhile, as at the census date, compared to the national average, households in the Great Lakes Council local government area had a significantly lower than average proportion where two or more languages are spoken ; and a significantly higher proportion where English only was spoken at home.
At the time of its dissolution, the Great Lakes Council was composed of nine Councillors elected proportionally as a single ward. All Councillors were elected for a fixed four-year term of office. The Mayor was elected by the Councillors at the first meeting of the Council. The most recent and last election was held on 8 September 2012 and the makeup of the Council was as follows: The last Council, elected in 2012 and dissolved in 2016, in order of election, was: