1. Only 1 in 5 Americans use Twitter.
2. About 20% of its users contribute 80% of the content
3. Around 36% of users identify as Democrat. Last month only 25% of adults identified as Democrat.
4. Republicans are underrepresented by 4-5%.
5. Independents are under represented by 7%-10%.
6. The number of people on Twitter who are the under 35 bracket is 3x higher than the US population
7. College educated Americans are nearly half of the domestic Twitter market despite the fact only 1 in 3 Americans completes a 4 year degree
8. Over 40% of users with an English setting aren't even from the United States

https://www.pewresearch.org/fact-tank/2019/08/02/10-facts-about-americans-and-twitter/pdl_04-24-19_twitter_users-00-03/