By now, we know which countries are the most populous in the world: China and India. They also happen to be on the same continent, which means much of the world's population is located within the Asia-Pacific region.
The highlighted circle on this map is where the majority of the world's population resides and it is all in Asia. If you thought the United States was densely populated, then think again. It only accounts for 5 percent of the global population.