The world’s population will reach 7 billion on Oct. 31, according to the U.N. Here are the 12 countries with the largest populations in the world.
China: 1,336,718,015 Parents sleep on mats laid out on the floor of a gymnasium inside a university campus in Wuhan, China. Some parents of first-year university students stay at school for the first few days to ease their children’s first-week jitters. Reuters Buy Photo