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% annualSydney is the top destination for domestic and international travellers to capital cities in Australia. In the year ending December 2025, Sydney welcomed 33.2 million domestic visitors,