Population size - country data from around the world:
The average for 2016 was 37.74 million.The highest value was in China: 1378.66 million and the lowest value was in Tuvalu: 0.01 million. Below is a chart for all countries where data are available for: Population size.
Definition: Total population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship. The values shown are midyear estimates.