World Population Prospects
The United Nations World Population Prospects (WPP) is the official series of global population estimates and projections produced by the Population Division of United Nations Department of Economic and Social Affairs (UNDESA). Each new revision presents updated data on population size by country and region, covering past estimates (from 1950 onward) and future forecasts (typically through 2100).
Source: Wikipedia — World Population Prospects (CC BY-SA 4.0)