| Name | City | St. | Country | Email | Scope | Network | Update | Map |
| Brave New Films | Los Angeles | California | United States | Email | Local | | 09-01
2005 |  |
| Bristol ISM (Bristol University UK) | | | UK | Email | Local | | 03-01
2006 | |
| Broadneck Students from Amnesty International | Annapolis | Maryland | United States | Email | Local | | 02-27
2003 | |
| Broadway Cares/Equity Fights AIDS | New York | New York | United States | Email | Metro | | 04-21
2005 | |
| Brooklyn Students Against Genocide in Darfur | Brooklyn | New York | United States | Email | Local | | 03-17
2008 | |
| Brower Youth Awards | Sanb Francisco | California | United States | Email | National | Network | 03-12
2008 | |
| Brown Berets de Watsonville (Autonomous Chapter) | Watsonville | California | United States | Email | Local | | 08-09
2006 | |
| Brown Students for Education Reform | Providence | Rhode Island | United States | Email | Local | | 01-07
2009 | |
| Bryant Pride | Smithfield | Rhode Island | United States | | Local | | 11-12
2007 | |
| Bryn Mawr College One World | Bryn Mawr | Pennsylvania | United States | Email | Local | | 02-06
2004 | |
| Buffalo Field Campaign | West Yellowstone | Montana | United States | Email | National | | 12-19
2004 | |
| BuffState Students for Peace | Buffalo | New York | United States | Email | Local | | 09-10
2006 | |
| Buildresources.org | Philadelphia | Pennsylvania | United States | Email | Local | | 02-22
2005 | |
| Burlington Voter Power | Burlington | Vermont | United States | Email | Local | | 06-12
2006 | |
| Bush Can BITE Me | | | United States | Email | Local | | 04-21
2005 | |
| Business Ethics Network | Suisun City | California | United States | Email | International | Network | 11-19
2010 | |
| Buyblue.org | San Francisco | California | United States | Email | National | | 02-05
2006 | |
| BVO Nepal-Experience Nepal through out Volunteering | Kathmandu | Nepal (general) | Nepal | Email | International | | 11-19
2007 | |
| BYCOE STUDENTS OF BAYELSA | Yenagoa | Bayelsa | Nigeria | Email | Local | | 11-22
2010 | |
| BYU Eco-Response! | Provo | Utah | United States | Email | Local | | 11-21
2006 | |
