10. Madison, Wis.
Number of bicycle commuters: 6,826
Bicycle commuters' share of overall population: 5%
There's no question Madison's ridership numbers benefit greatly from the University of Wisconsin's presence. Students make up 26% of the population in Madison and factor heavily in the bike commuter statistics of just about every city on this list.
That doesn't mean they're the only reason people are riding. Madison has more than 107 miles of bike lanes and paths throughout the city that benefit the state capital's government, health care and biotech workers just as much as the average UW undergrad.
The city also just happens to be the capital of the same state that counts Trek Bicycle as one of its big business residents. As a result, Wisconsin accounts for roughly one-fifth of all bicycles produced in the U.S. Bikes are a big part of the Madison's culture, and commuters are quick to respond when their alternate commute becomes a standard rather than an exception.