Here's an infographic by Online MBA, that breaks down the demographics, including education level, income, age and gender of social media users, along with other miscellaneous facts.

Most of us spend good portions of our professional days monitoring and engaging with the world's Tweets on Twitter. Us marketers carefully craft campaigns, but we never really know who specifically is watching. This infographic is based a survey of 500 Twitter users conducted by market research company, Lab42.