data sydney 2024Sydney's 2025 population is now estimated at 5,248,790. In 1950, the population of Sydney was 1,689,940. Sydney has grown by 63,890 in the last year, which represents a 1.23% annualSource of data. Temperature, humidity and rainfall observations are from Sydney (Observatory Hill) {station 066214}. Pressure, cloud, evaporation and sunshine observations are from