Here is a list of intercountry adoptee led groups who include adoptees of any country of origin, based in receiving (adoptive) countries:
Australia has InterCountry Adoptee Voices.
Canada has english language based Subtle Asian Adoptee Traits (SAAT Canada), Transracial Adoptee Community of BC (TAC, in British Columbia), Adult Adoptee Network is a meet up group (for all adoptees) based in Ontario.
Other organisations based in Canada run by intercountry adoptees who have a special focus:
Colours of Adoption is a Montreal book project founded to bring together an intercountry adoption anthology in French.
Out of the Fog is a podcast co-created by Ethiopian adoptee.
Adoptees On is a podcast and source of many adoption support resources by domestic adoptee.
A special focus group for Truth & Reconciliation about intercountry adoption in Europe is United European Adoptees (UEA).
Germany has Adoptierte aus aller Welt
New Zealand has I’mAdopted which covers domestic & intercountry but is founded by two intercountry adoptees, one Romanian, the other Russian.
The USA has Adopteen (for teenagers), Adoptees of Chicago, Adoption Museum Project, Subtle Asian Adoptee Traits, I Am Adoptee, Transracial Eyes, International-Adopt-Talk, Transracial Adoption, The Adoptee Group, Adoptees who cut ties, Global Adoptees, Unite Our Dream, Network of Politicized Adoptees and Yeondae. An all adoptee support group run by intercountry adoptees are San Francisco Bay Area; platforms Dear Adoption, Overcoming Odds provide adoption related resources and both are created by intercountry adoptees. A platform supporting adoptee storytelling that includes all adoptees can be found at Adoptee Voices.
Other organisations based in the USA led by intercountry adoptees, who have a special focus:
Adoptionland works to politically draw attention to the human trafficking aspect of intercountry adoption.
AdopteeRightsCampaign who actively works to bring about legislative change for the estimated 35,000 intercountry adoptees, who currently have no US citizenship.
Adoptees4Justice who work to achieve just and humane adoption, immigration and restorative justice.
Family Preservation 365 advocates for the prevention of family separation.
Special global focus group led by intercountry adoptee: AQA (Asian, African, Aborigine/Autochtones Queer Adoptees)