The Unicycling Society of America, a national organization for unicycling in the US and Canada. Sponsors conventions and publishes a newsletter. The Twin Cities Unicycle Club is the largest and oldest unicycle club in Minnesota with over 200 unicyclists.
Membership is open to anyone who shares the interest of unicycling.
If you don't know Japanese, there are still some good pictures. Large unicycle club serving greater Detroit, Michigan. A group of unicyclists and jugglers serving Austin, Texas. Help build the largest human-edited directory on the web. The content of the Google directory is based on the Open Directory and is enhanced using Google's own technology.