Currently, the three most populated countries in the world are China, India, and the United States.
According to the United Nations, as of 2019, China's population was estimated to be around 1.4 billion people, followed by India with approximately 1.3 billion people, and the United States with around 329 million people.
Other highly populated countries include Indonesia, Brazil, Pakistan, Nigeria, Bangladesh, Russia, and Japan. It is important to note that population numbers are constantly changing due to factors such as birth rates, death rates, immigration, and emigration.