This is a list of countries and dependencies by population. It includes sovereign states, inhabited dependent territories and in some cases, constituent countries of sovereign states, with the list being primarily based on the ISO standard ISO 3166-1. For instance the United Kingdom is considered a single entity. In addition this list also includes certain unrecognized states not found in ISO 3166. The number shows how many people live in each country. Countries with the most people are at the top of the list. Countries with the fewest people are at the bottom.