The following Tribal Nations and Tribal organizations have passed resolutions or provided letters in support of the Marshall Plan for Tribal Nations:
- Affiliated Tribes of Northwest Indians (ATNI)
- California Tribal Chairpersons Association (CTCA)
- Coalition of Large Tribes (COLT)
- Great Plains Tribal Chairmans Association (GPTCA)
- Midwest Alliance of Sovereign Tribes (MAST)
- National Indian Health Board (NIHB)
- Native American Finance Officers Association (NAFOA)
- Tribal/Interior Budget Council (TIBC)
- United Tribes of Michigan (UTM)