Chicagoland Bicycle Federation
- Regional bicycle advocacy for the City and Northeastern Illinois.
- http://www.biketraffic.org/

Cycling Sisters
- Advocacy group that supports the increase of female bike commuters in the city by providing educational programs, maintenance classes, support and networking.
- http://www.cyclingsisters.org/

Working Bikes Cooperative
- Non-profit volunteer organization recovers donated and landfill-bound bicycles, repairs them to working condition, and sells them to Chicagoans at a low cost in order to fund shipments of bicycles and bike parts to developing countries. Discussion forums,
- http://www.workingbikes.org/

Chicago Critical Mass
- Advocacy group that features news, events and information on the group's activities, press releases, annual art show, and contacts. Also, offers a photo gallery, flyers and FAQs.
- http://www.chicagocriticalmass.org/

Chicago Cycling Club
- Social club dedicated to promoting safe group cycling while highlighting the city as a viable place to tour.
- http://www.chicagocyclingclub.org/

Late Ride
- Starting from Buckingham Fountain at Congress and Columbus Drive in Chicago and going for 25 miles through many Chicago neighborhoods. The area's only after-midnight non-competitive bicycle ride.
- http://www.lateride.org/

XXX Racing
- A USA Cycling group that is comprised mainly of bike messengers.
- http://www.xxxracing.org/