The United States is the country that uses Twitter the most, with approximately 69 million active users as of 2021. Japan comes in second with over 51 million active users, followed by India with over 18 million active users. Other countries with a significant number of Twitter users include the United Kingdom, Brazil, Indonesia, and Mexico.
However, it’s important to note that the number of Twitter users in a country can change over time, and different sources may report slightly different numbers. Additionally, the demographics and behavior of Twitter users can vary between countries, which can impact how businesses and individuals use the platform for marketing and engagement.