The top 50 countries by smartphone users have a combined total of 2.7 billion smartphone users or 42.33% of their combined population.

The world's top 3 countries by smartphone users are :

1. China - 782 million users (55.3% of population)
2. India - 374 million users (27.7% of population)
3. United States - 251 million users (77% of population)

Compare the two top countries with most smartphone users - China and India

Compare the smartphone user base and populations of India and United States

This data is derived from Newzoo's 2018 study of the top 50 countries/markets by smartphone users and penetration (refer to URL below). According to Newzoo, a smartphone user is defined as anyone using a smartphone at least once a month. These numbers come from Newzoo's annual Global Mobile Market Report and are derived based on considerations of a country's economic progression, demography, online population and inequality.