According to this list on twitter.grader.com, Columbus is currently ranked as the 27th top city in the world based on number of Twitter users. This ranking bases information on the “Location” setting in your twitter profile, so if you’d like to see our ranking improve, make sure you have Columbus, Ohio listed as your current location.
Currently topping the list is the city of London. Los Angeles, Chicago, San Francisco and New York round out the top five.
Columbus is ranked higher than Nashville (28), Las Vegas (29), Indianapolis (30), Pittsburgh (33), Cleveland (36), and Cincinatti (41).