| Name | City | St. | Country | Email | Scope | Network | Update | Map |
| Berea College Progressive Alum Association | Berea | Kentucky | United States | Email | Local | | 01-31
2006 |  |
| Bergen Action Network | Englewood | New Jersey | United States | | Local | | 04-06
2003 | |
| Bergen County Students for a Democratic Society | Fair Lawn | New Jersey | United States | Email | Metro | | 08-07
2008 | |
| Berkeley Bears for UNICEF | Berkeley | California | United States | Email | Local | | 10-04
2005 | |
| Berkeley Organization for Animal Advocacy | Berkeley | California | United States | Email | Local | | 08-20
2003 | |
| Berkeley Students Organizing for Justice in the Americas (SOJA) | Berkeley | California | United States | Email | Local | | 02-03
2004 | |
| Berkeley Watch | Berkeley | California | United States | Email | Local | | 04-25
2004 | |
| Best Volunteer Nepal | Kathmandu | Nepal (general) | Nepal | Email | National | | 03-20
2008 | |
| Better The World | Toronto | Ontario | Canada | | International | | 11-25
2009 | |
| Beverly Hills OPAS | Beverly Hills | California | United States | Email | Local | | 09-26
2005 | |
| Bildungsstreik Bündnis an der Universität Duisburg-Essen | Essen | Nordrhein-Westfalen | Germany | | Local | | 10-30
2009 | |
| Bill of Rights Defense Committee | Northampton | Massachusetts | United States | Email | National | Network | 08-05
2004 | |
| Bina Kehilla | | | United States | Email | National | | 04-08
2005 | |
| Biotechnology High School | Allentown | New Jersey | United States | Email | Local | | 01-19
2009 | |
| Bishop Amat H.S. Peace and Justice Club | La Verne | California | United States | Email | Local | | 04-29
2005 | |
| Black Car Project | Olympia | Washington | United States | Email | Local | | 09-17
2007 | |
| Black Mesa Indigenous Support | Flagstaff | Arizona | United States | Email | State | | 05-22
2005 | |
| Black Panther Party for Self Defense | Centereach | New York | United States | Email | Local | Network | 04-27
2008 | |
| Blah blah | | | United States | | Local | | 08-14
2013 | |
| Bloomington Media Arts Group @ Indiana University | Bloomington | Indiana | United States | Email | Local | | 07-30
2005 | |
