This statistic gives information on the total number of internet users worldwide from 2005 to 2018. As of the most recent reported period, the number of internet users worldwide was 3.9 billion, up from 3.65 billion in the previous year.

Easier access to computers, the modernization of countries around the world and an increased utilization of smartphones has given people the opportunity to use the internet more frequently and with more convenience. However, internet penetration often pertains to the current state of development regarding communications networks. As of December 2017, there were approximately 772 million total internet users in China and 312 million total internet users in the United States. However, broadband internet usage is not equally present in many countries and due to infrastructure reasons, developing online markets rely strongly on mobile connections. Subsequently, global mobile data traffic is set to surpass 77 exabytes per month in 2022, up from 11.5 exabytes per month as of 2017.

Social networking is one of the most popular online activities and Facebook is the most popular online network based on active usage. As of the third quarter of 2018, there were over 2.2 billion monthly active Facebook users, accounting for almost half of internet users worldwide. Connecting with family and friends, expressing opinions, entertainment and online shopping are amongst the most popular reasons for internet usage.