- Wild Horse Sanctuary
- Wildlife Alliance
- Wildlife Trust Inc
- Winrock International
- Women for Women International
- Women of Color Resource Center
- Women's Funding Network
- World Agroforestry Centre
- World Federation for Mental Health
- World Institute on Disability
- World Land Trust - US
- World Relief Corp Of National Association Of Evangelicals
- World Vets
- Writers In The Schools
- Youth Speak Collective