The most southern city in the world is in Australia

Explanation

This title is contested between Ushuaia (Argentina) and Puerto Williams (Chile) depending on the definition of a city. Puerto Williams is the most southern one and was granted city status in 2019 with a population of roughly 2000-3000, but Ushuaia is widely recognized as the southernmost city due to its significantly larger population of roughly 82,000–90,000 and its status as a major commercial and tourist hub.