The ranking is based on education, eating, exercise habits and socialbility in different communities.
If you live in Salt Lake City, you're among the top seven cities for library use.
In fact, Utahns go there twice as much as people across the nation.
Arlington, Virginia came in second when it comes to education.
Seven in ten people there have at least a bachelors degree, that's far above the national average.
When it comes to healthy living, San Francisco ranks number one.
That city has plenty of farmer's markets, so people can fill-up on plenty of brain-healthy foods.