Catholic Citizens of Illinois
- A source of news, views and events of interest to the state's Catholics. Interviews, newsletters, archives and contacts provided.
- http://catholiccitizens.org/

Catholic Charities of the Diocese of Joliet
- Providing community services, counseling and addiction services, senior programs, children's services and early childhood services (Head Start) in Will, Grundy, DuPage, Kendall, Kankakee, Ford and Iroquois counties.
- http://www.cc-doj.org/

Catholic Charities of the Diocese of Rockford
- Provides community and social services and programs to residents throughout an eleven county region in Northern and Northwestern Illinois. Features newsletter, area locations and contact information, donation form, and services overview.
- http://www.ccrfd.org/

Knights of Columbus - Illinois State Council
- Information and projects from this Catholic male organization.
- http://www.illinoisknights.org/