8. Iowa City, Iowa
Percentage of bicycle commuters:
Much like Ann Arbor, Iowa City benefits from having a built-in bike base at the University of Iowa and a local government that's been in favor of bikes for more than 40 years.
Iowa City has had a plan for bike paths and trails in place since 1968 and has a great community of shops and bike-friendly builders supporting the effort. It may seem like a lot of work just to placate college students, but that presumes that those students ever leave Iowa City. Roughly 44% of Iowa City adults have a bachelor's degree or better, second only to Stamford, Conn., and they tend to be just the type of crowd that pedals its way to the city's arts festivals, jazz festivals and literary events.