🇦🇺 True Size of Australia vs USA 🌎 Answer: Most maps make Australia look smaller than the United States, but in reality, their sizes are surprisingly close! The USA (including Alaska) covers about 9.83 million km², while Australia spans 7.68 million km². That means Australia is roughly 78% the size of the USA — almost as big, but with far fewer people. If you place Australia over a true-scale map of the U.S., it stretches from California to South Carolina and covers most of the mainland. On d