Seattle, Washington made #1!
If you link intelligence with education, then Seattle is the smartest U.S. city! It has over 40 colleges/universities and nearly 20 libraries, which might explain why 52.7% of its residents have an undergraduate degree and 90%, have a high school diploma!
Do you think you are smart? If so, check out ForRent.com for apartments for rent in Seattle or one of the other five cities that made the list!