Since early 2018, there has been a series of letters and documents related to the UN2020 Initiative open for civil society endorsement. The following organizations have expressed support for one or more of these letters and documents.
| Academic Council on the United Nations System |
| Action for Sustainable Development (A4SD) |
| Action on SDGs Kenya National Coalition (ASDGC-KENYA) |
| Adéquations, France |
| Afghanistan Justice Organization |
| African Coalition on Green Growth |
| African Foundation for Environment and Development |
| African Philanthropic Foundation |
| Afrihealth Optonet Association, Nigeria |
| All for Education! National Civil Society Coalition |
| All Win Network Foundation |
| Amis des Etrangers au Togo |
| Asabe Shehu Yar’Adua Foundation |
| Asia Development Alliance (ADA) |
| Association 3 Hérissons |
| Association for Farmers Rights Defense (AFRD) |
| Association for Promotion Sustainable Development, India |
| Association Luxembourgeoise pour les Nations Unies (ALNU/ UNA Luxembourg) |
| Association of World Citizens |
| Association pour Action de Développement Communautaire (AADC), Burundi |
| Association pour l’Integration et le Developpement Durable (AIDB), Burundi |
| Assoiation of World Citizens |
| Bangladesh Model Youth Parliament |
| Blue Banner NGO (Mongolia) |
| Bread for the World, Germany |
| Buddhist Tzu Chi Foundation |
| Campaign for a UN Parliamentary Assembly |
| Canadian Voice of Women for Peace |
| Centre for Human Rights – Nis |
| Centre for Human Rights and Climate Change Research |
| Centre for Human Rights and Development |
| Centre for Socio-Eco-Nomic Development (CSEND) |
| Child Rights International Network |
| Citizens for Global Solutions |
| CIVICUS: World Alliance for Citizen Participation |
| Civil Society Development Association (ARGO) |
| Climate Change Network Nigeria (CCN-NIGERIA) |
| Climate Watch Thailand |
| Commons Cluster of the UN NGO Major Group |
| Community Science Centre Vadodara (India) |
| Congregation of Our Lady of Charity of the Good Shepherd |
| Control Arms |
| Council of Organizations of the UNA-USA |
| Council on Energy, Environment and Water (CEEW), India |
| Deepti Bhuban |
| Democracy Matters |
| Democracy Without Borders |
| Democracy Without Borders Sweden |
| Development Goals Global Watch (DGGW) Inc. |
| Die Mondialisten |
| Dr Uzo Adirieje Foundation (DUZAFOUND) |
| East Africa Climate Change Network |
| Echoes of Women in Africa Initiative (ECOWA), Nigeria |
| Elizka Relief Foundation |
| Elmoustkbal for Media, Policy and Strategic Studies, Egypt |
| Emmaus International |
| Emonyo Yefwe International |
| End Water Poverty |
| Enlaces por la Sustentabilidad, El Salvador |
| EPE (Ethical-Possibility-Enhancement) Movement |
| Equality Bahamas |
| Equidad de Género |
| Equity and Justice Society for One Plateau |
| Federación de Planificación Familiar Estatal |
| Federation of Environmental and Ecological Diversity for Agricultural Revampment and Human Rights |
| Feminist League |
| Fiji Women’s Rights Movement |
| Fondazione Proclade Internazionale – Onlus |
| Foundation for Women’s Rights Promotion and Development |
| Free Trade Union Development Center (FTUDC), Sri Lanka |
| Friedrich-Ebert-Stiftung New York Office |
| Fundación Arcoiris por la Diversidad Sexual, Mexico |
| Fundación para Estudio e Investigación de la Mujer (FEIM) |
| Gatef organization |
| Global Call to Action against Poverty |
| Global Citizen |
| Global Family |
| Global Justice Now |
| Global Voice |
| Globalt Fokus |
| Graduate Women International |
| Green Hope Foundation |
| Guahan Coalition for Peace and Justice |
| Habitat International Coalition |
| HaritaDhara Research Development and Education Foundation, India |
| Hawai’i Institute for Human Rights |
| HOPE Worldwide-Pakistan |
| Housing and Land Rights Network |
| Idara-e-Taleem-o-Aagahi Public Trust (ITA) / Centre for Education and Consciousness |
| Igarapé Institute |
| Indian Ocean Peace Council (IOPC) |
| INDICEP – Instituto de Investigación Cultural para Educación Popular |
| INHURED International |
| Institute for Planetary Synthesis |
| Institute For Sustainable Development and Research, ISDR, India |
| Institute of the Blessed Virgin Mary – Loreto Generalate |
| International Alliance of Women (IAW) |
| International Association for Religious Freedom – IARF South Asia |
| International Association for the Advancement of Innovative Approaches to Global Challenges IAAI |
| International Association of World Peace Advocates |
| International Environment Forum |
| International Federation of Business and Professional Women (IFBPW) |
| International Federation of Settlements and Neighborhood Centers |
| International Federation of Women in Legal Careers (FIFCJ) |
| International Federation of Women Lawyers (FIDA) |
| International Federation on Ageing (IFA) |
| International Media Support (IMS) |
| International Network for Corporate Social Responsibility |
| International Network for the Prevention of Elder Abuse (INPEA) |
| International Peace Bureau |
| International Presentation Association |
| International School of Santo Domingo |
| JAD (Justice, Action, and Development) Foundation |
| Jeunes Volontaires pour l’Environnement (Sena Alouka) |
| Joint Energy and Environment Projects |
| Journalists for Human Rights, Macedonia |
| Justice Coalition of Religious |
| Justice for All/BurmaTask Force |
| Justice, Aid and Development Foundation |
| Kenana Association for Sustainable Development and Women Empowerment, Egypt |
| Kikandwa Environmental Association (KEA), Uganda |
| Krisoker Sor (Farmers’ Voice), Bangladesh |
| KULU – Women and Development, Denmark |
| Kyosiga Community Christian Association for Development (KACCAD), Uganda |
| Labour, Health and Human Rights Development Centre |
| Lanka Fundamental Rights Organization, Sri Lanka |
| Lawyers Committee on Nuclear Policy |
| Learning for Sustainability, Scotland |
| Leiden University |
| Let There Be Light International |
| Literate Pakistan Programme (Syed Ejaz Hussain Shah) |
| Lumos |
| Mahila Dakshata Samiti, India |
| Mexican Foundation for Family Planning |
| Millennia2025 Women and Innovation Foundation |
| Mills College |
| National Campaing For Sustainable Development Nepal |
| National Coalition of Civil Society Organizations of Liberia (NSACCSOL) |
| National Society of Conservationists – Friends of the Earth, Hungary |
| NET Africa – Natural Environment Technology (Fadeke Ayoola) |
| Network of Rural Women Producers Trinidad and Tobago (NRWPTT) |
| NGO Committee on Sustainable Development – NY |
| NGO Federation of Nepal |
| NGO Legal Media Center |
| NGO-Coordination post Beijing Switzerland |
| Nigeria Network of NGOs |
| Noble Delta Women for Peace and Development |
| Nonviolence International |
| Noordendorp International Company |
| NQBSS Livestock Breeders |
| NQBSS Livestock Breeders |
| Omaki and Moses-Ugo-Ohaegbuchi) |
| One heart ONE LOVE |
| One World Trust |
| Parliamentarians for Nuclear Non-Proliferation and Disarmament |
| Partenariat National de l’Eau de Guinée (PNEGUI) |
| Peace Center Lahore |
| People’s forum and Platform of SDGs -Network |
| PEPL Institute – Peace Education and Political Leadership Institute |
| Plastic Pollution Coalition (PPC) |
| PyeongChang Global Peace Forum |
| Radanar Ayar Association, Myanmar |
| Radha Paudel Foundation, Nepal |
| Rapad Maroc, Morocco |
| Reacción Climática- Bolivia |
| Recherches et Documentation Juridiques Africaines (RDJA) asbl |
| Red Dot Foundation Global |
| Red Dot Foundation, India |
| Reseau des citoyens haitiens pour la promotion des droits de l’homme |
| RIPESS Intercontinental Network for the Promotion of Social Solidarity Economy |
| Rural Area Development Programme (RADP), Nepal |
| Rural Builders Organisation (Andrew Oshogwe) |
| Russian Association of Progressive Humanists – Российское Объединение |
| Salesian Missions Inc. |
| Sanctus Initiative for Human Development and Values Sustainability (SIHDEVAS) |
| Savannah Centre for Diplomacy, Democracy and Development |
| Scofield Associates |
| Scottish Ahlul Bayt Society |
| Scottish Council for Voluntary Organisations |
| SenEval Association Sénégalaise d’évaluation |
| Servicios Ecuménicos para Reconciliación y Reconstrucción |
| Shirley Ann Sullivan Educational Foundation |
| Shishu Aangina |
| Shumei International |
| Sisters of Charity Federation |
| Society for Conservation and Sustainability of Energy and Environment in Nigeria (SOCSEEN) |
| Society for International Development (SID) |
| Society for Threatened Peoples – Germany |
| Society of Catholic Medical Missionaries |
| Solar Health Uganda |
| Soroptimist International |
| Soroptimist International Great Britain & Ireland (SIGBI) |
| Southern Africa Climate Change Coalition |
| Southern Africa Human Rights NGO Network (SAHRiNGON) Tanzania Chapter |
| SRS Livestock Development Foundation |
| Stakeholder Forum for a Sustainable Future |
| Stanley Foundation |
| Success Capital Organisation |
| Tamkeen Association for Rights of People with Disabilities, Egypt |
| Terram Pacis |
| The Global Sunrise Project |
| The Millenials Movement |
| The Mondialists – World Citizens for the Unity of Mankind |
| The Stimson Center (Just Security 2020 Program) |
| Theatre of Transformation Academy |
| Theorist and Member Academic Council of the United Nations System |
| Together First |
| Transdiaspora Network |
| U-Solve School of Empathic Leadership & Entrepreneurship (SELE) |
| UDYAMA (Pradeep Mahapatra) |
| Union des Amis Socio Culturels d’Action en Development (UNASCAD), Haiti |
| United Methodist Church—General Board of Church and Society |
| United Nations Association – Australia (Lachlan Hunter) |
| United Nations Association – Denmark (Torleif Jonasson) |
| United Nations Association – Finland |
| United Nations Association – Germany |
| United Nations Association – Scotland |
| United Nations Association – Suriname |
| United Nations Association – UK |
| United Nations Association – USA Council of Organizations |
| United Nations Association – Zimbabwe |
| VOICE, Bangladesh |
| WaterAid |
| Women Coalition for Agenda 2030 |
| Women Environmental Programme (WEP) |
| Women for Water Partnership |
| Women’s Federation for World Peace International |
| Women’s Major Group for Sustainable Development |
| Women’s March Global |
| Women’s International League for Peace and Freedom (WILPF) |
| Workable World Trust |
| World Citizens Association of Australia |
| World Council of Peoples for the United Nations (WCPUN) |
| World Democratic Governance project asociation – WDGpa |
| World Federalist Movement – Canada |
| World Federalist Movement – Institute for Global Policy (WFM-IGP) |
| World Federation for Mental Health |
| World YWCA |
| Youth Foundation of Bangladesh |
| YWCA Canada |
| Zimbabwe Climate Change Coalition |
| Zimbabwe United Nations Association |
| Zimbabweanwomen5050 Trust |
| Zonta International |