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 (international peer support network and advocacy hub) and Adoptation (regular online peer support group for Australian local and intercountry adoptees).
Belgium has Adoptie Schakel and L’écho des adoptés Belges (French).
Canada has French language based L’Hybride and RAIS both in Montreal.
Canada has English language based: Asian Adoptees Canada, Transracial Adoptee Community of BC (TAC, in British Columbia), Adult Adoptee Network is a meet up group (for all adoptees) based in Ontario, Subtle Asian Adoptee Traits (SAAT Canada).
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.
Denmark has Transracial Adoption Skandinavien.
Special focus group Danish Korean Rights Group (DKRG) works to obtain recognition of human rights abuses in intercountry adoption from Korea.
Europe
A special focus group for Truth & Reconciliation about intercountry adoption in Europe is United European Adoptees (UEA), Subtle Asian Adoptee Traits (SAAT) Europe, Critical Adoptees Front Europe (CAFE).
Finland has Vuxna Internationellt Adopterade i Finland (VIA)
France has La Voix Des Adoptés (VDA), Entre Personnes Adoptées.
Special focus groups to represent illegal intercountry adoptions in France, is I AM and RAIF
Germany has Adoptierte aus aller Welt
Italy has AdoptCloud, ArP Adoptic, Associazione Nazionale Figli Adopttivi (ANFAD)
Norway has Adopsjon i endring (AiE), UTAD Critical
Netherlands has Adoptee & Foster Coach (AFC), Adoptie Superhelden in Beweging,
Adoptiecafe, Wereld Kids (for teenagers)
Spain has La voz de los adoptados
UK has ICAV UK, Transracial Adoption, Adoption Arena and a new advocacy group which includes domestic and intercountry adoptees UK Adult Adoptee Movement
USA has I Am Adoptee with a subsidy program for mental health counselling, Subtle Asian Adoptee Traits, Transracial Adoption, Adoptees who cut ties, Network of Politicized Adoptees
Adoptee led orgs with resource info but no longer active: Adoption Museum Project, Transracial Eyes, International-Adopt-Talk, The Adoptee Group, Unite Our Dream, People for Ethical Adoption Reform (PEAR), Yeondae, San Francisco Bay Area; Dear Adoption, Adoptee Rights Campaign (ARC), AQA (Asian, African, Aborigine/Autochtones Queer Adoptees)