General Animal Rights
American Society for the Prevention of Cruelty to Animals
https://www.aspca.org
Animal Ethics
https://www.animal-ethics.org
Animal Legal Defense Fund
https://aldf.org
Animal Outlook
https://animaloutlook.org
Animal Protection and Rescue League
https://www.aprl.org
Best Friends Animal Society
https://bestfriends.org
Direct Action Action Everywhere
https://www.directactioneverywhere.com
Farm Animal Rights Movement
https://farmusa.org
Friends of Animals
https://friendsofanimals.org
Humane Society of the the United States
https://www.humanesociety.org
In Defense of Animals
https://www.idausa.org
Last Chance for Animals
https://www.lcanimal.org
Massachusetts Animal Rights Coalition
https://massanimalcoalition.com
Mercy for Animals
https://mercyforanimals.org
No Kill Advocacy Center
https://www.nokilladvocacycenter.org
Non-Human Rights Project
https://www.nonhumanrights.org
People for Ethical Treatment of Animals (PETA)
https://www.peta.org
Wild Animal Initiative
https://www.wildanimalinitiative.org
Animal Charity Evaluators
https://animalcharityevaluators.org
Animal Rights Militia
https://greenpolitics.fandom.com/wiki/Animal_Rights_Militia
Farm Sanctuary
https://www.farmsanctuary.org
United Poultry Concerns
https://www.upc-online.org
Factory Farming Awareness Coalition
https://ffacoalition.org
Groups Focused on Animal Testing
American Anti-Vivisection Society (AAVS)
https://aavs.org
Americans for Medical Advancement
https://www.afma-curedisease.org/opposition.aspx
Animal Defenders International
https://www.ad-international.org/adi_home/
Center for Alternatives to Animal Testing
https://caat.jhsph.edu
Cruelty Free International
https://crueltyfreeinternational.org
Great Ape Project
https://www.projetogap.org.br/en/
New England Anti-Vivisection Society
http://my.neavs.org/site/PageServer;jsessionid=00000000.app311b?pagename=privacypolicy&NONCE_TOKEN=AC6A4FD4E23647BD903E55FCE5260404
Primate Freedom Project
http://www.primatefreedom.com
Rocky Mountain Animal Defense
https://rockymountainanimaldefense.wordpress.com
Vegan or Vegetarian-oriented Groups
Vegan Outreach
https://veganoutreach.org
Vegan Society
https://www.vegansociety.com