Population Density, Fertility Rate, Median Age, Migrants. This has profound effects in ways that are only just becoming apparent. Australia, formally the Commonwealth of Australia, is a country and sovereign state in the southern hemisphere, located in Oceania.Its capital city is Canberra, and its largest city is Sydney.. Australia is the sixth biggest country in the world by land area, and is part of the Oceanic and Australasian regions. According to the Australian Bureau of Statistics (ABS), Australia’s resident population (excluding overseas visitors) was 21,507,700, so we are 8.3% bigger than we were in 2006. Its capital city is Canberra and its most important economic and cultural centers are Sydney and Melbourne. Data tables, maps, charts, and live population clock. All-time population total. Population by Country Countries (and dependencies) in the world ranked by population. Having "no religion" is becoming the new "normal" in Australia. Analysis of the religious affiliation of the population of the City of Sydney in 2016 compared to Greater Sydney shows that there was a lower proportion of people who professed a religion and a higher proportion who stated they had no religion. Countries in the world by population (2020) This list includes both countries and dependent territories.Data based on the latest United Nations Population Division estimates. Australia, the smallest continent and one of the largest countries on Earth, lying between the Pacific and Indian oceans in the Southern Hemisphere. 1 Year change, migrants, median age, fertility rate, area (Km²), urban population, share of world's population, global rank. Population of Australia: today, historical, and projected population, growth rate, immigration, median age. Click on the name of the country or dependency for current estimates (live population clock), historical data, and … World population by Region and by Religion. It is important to note that to keep a stable percentage of the population from 2011 to 2016, a religious group had to grow by 8.8% – the national population growth rate. Update to date information about population of Australia in 2020.