Bombay Bicycle Club

Brazen Dropouts
A bicycle racing team. Sponsors of the Wheels on Willy bike race and the winter bike swap. Presented by CRONOMETRO.

Capitol Velo Club
Another a bicycle racing team. Sponsors of the TDS Telecom Racing Classic.

Great Dane Velo Club
Yet another bicycle racing team. Sponsoring spring races.

Stoton Velo Club
And finally, one more bicycle racing team. This one sponsors a popular cyclocross race in the Fall.

Wednesday Night Rides
Not actually a club, just an informal group of cyclists who are out for a ride every Wednesday night from April through to October.

The Wingra Heron Hops and Derailler Society
This is a group of fast riders that head out on weekday day mornings.

A more extensive list is maintained by the Bicycle Community Page.

Wisconsin

BoneShakers
We are a grassroots competitive cycling club partaking in all forms of bike racing.

Chequamegon Area Mountain Bike Association (CAMBA)
Trail information around Chequamegon National Forest area in Northwest Wisconsin. (800) 533-7454

Chippewa Valley Cycling Club
Racing club in Chippewa Valley.

Couples on Wheels
Tandem club

Cream City Cycle Club
Milwaukee’s road bicycling club.

Mad Trail FORCs
Female Off-Road Cyclists

Over Hills Through Woods Cycling Club (OHTWCC)
A Fox Valley club that hosts weekly rides as well as 3 multi-day rides.

Ozaukee Bicycle Club
Club serves Milwaukee & Ozaukee Counties. The club is open to cyclists of all ages and abilities, from beginning riders to experienced racers.

Sparta Cycling Club
A small club devoted to promoting activities involving both racing and touring enthusiasts.

Tour de Fort Bicycle Club, Ltd
Apparently the hub of the bicycling universe is located in Fort Atkinson, WI

Wausau Wheelers Bicycle Club
Wausau

Wisconsin Lifecyclists
South Eastern Wisconsin

WISIL HPVers
Southern Wisconsin
The WISIL HPVers (Wisconsin - Illinois Human powered Vehicleers) is an eclectic group of bicycle riders, builders and racers.

Mike Bentley’s Wisconsin List

A more extensive list is maintained by the Bicycle Community Page.

Illinois

Chicagoland Bike Clubs List

League of Illinois Bicyclists List

Michigan

League of Michigan Bicyclists List

Washington

Wheel Power Christian Cyclists
A group of missionary cyclists that pedal across America. They will be in Wisconsin come July.