| Name | City | St. | Country | Email | Scope | Network | Update |
| Center for the Study of Political Graphics | Los Angeles | California | United States | Email | National | | 03-25
2008 |
| Center for Third World Organizing | Oakland | California | United States | Email | National | | 02-09
2006 |
| Center for Youth and Democracy | Mogadishu | Banaadir | Somalia | Email | Local | | 05-29
2007 |
| Center for Youth Organisation | Ibadan | OY | Nigeria | Email | State | | 11-10
2005 |
| Central Connecticut Progressive Student Alliance | New Britain | Connecticut | United States | Email | Local | | 09-22
2006 |
| Central Iowa Youth Activist Network | Des Moines | Iowa | United States | Email | Metro | Network | 09-08
2006 |
| Central Park Conservancy Youth Leadership | New York | New York | United States | Email | Local | Network | 03-11
2004 |
| CentrePeace, Centre College | Danville | Kentucky | United States | Email | Local | | 07-02
2004 |
| Century Students for SDS | Santa Ana | California | United States | Email | Local | | 10-16
2005 |
| Chapman University SPEAK | Orange | California | United States | Email | Local | | 02-17
2005 |
| Charlotte Progressive Student Union | Charlotte | North Carolina | United States | Email | Metro | | 01-26
2006 |
| CHC Campus Greens | Yucaipa | California | United States | Email | Local | | 10-29
2004 |
| Che Guevara Fan Club | Toronto | Ontario | Canada | Email | Local | | 05-14
2005 |
| Cheltenham Students for International Awareness | Wyncote | Pennsylvania | United States | Email | Local | | 03-13
2005 |
| Chestnut Hill College Gay-Straight Alliance | Philadelphia | Pennsylvania | United States | Email | Local | | 02-09
2005 |
| Cheyney Student Government | Cheyney | Pennsylvania | United States | Email | Local | | 05-02
2005 |
| Chi Delta Sorority | Rohnert Park | California | United States | Email | Local | | 09-10
2006 |
| Chicago Books to Women in Prison | Chicago | Illinois | United States | Email | Local | | 02-09
2006 |
| Chicago Global Donors Network | Chicago | Illinois | United States | Email | Local | | 11-01
2006 |
| Chicago SDS | Chicago | Illinois | United States | Email | Metro | Network | 02-05
2006 |
