| Period | UN International Decade | Lead / Key Organization |
| 2001–2010 | International Decade for a Culture of Peace and Non-violence for the Children of the World | United Nations |
| 2001–2010 | Decade to Roll Back Malaria in Developing Countries, Particularly in Africa | UN / WHO |
| 2001–2010 | Second International Decade for the Eradication of Colonialism | United Nations |
| 2003–2012 | United Nations Literacy Decade: Education for All | UNESCO |
| 2005–2014 | United Nations Decade of Education for Sustainable Development | UNESCO |
| 2005–2014 | Second International Decade of the World’s Indigenous People | United Nations |
| 2005–2015 | International Decade for Action: “Water for Life” | United Nations |
| 2006–2016 | Decade of Recovery and Sustainable Development of the Affected Regions (Third Decade after the Chernobyl Disaster) | United Nations |
| 2008–2017 | Second United Nations Decade for the Eradication of Poverty | United Nations |
| 2010–2020 | United Nations Decade for Deserts and the Fight against Desertification | UNCCD / United Nations |
| 2011–2020 | Third International Decade for the Eradication of Colonialism | United Nations |
| 2011–2020 | United Nations Decade on Biodiversity | Convention on Biological Diversity (CBD) |
| 2011–2020 | Decade of Action for Road Safety | WHO / United Nations |
| 2013–2022 | International Decade for the Rapprochement of Cultures | UNESCO |
| 2014–2024 | United Nations Decade of Sustainable Energy for All | United Nations |
| 2015–2024 | International Decade for People of African Descent | United Nations |
| 2016–2025 | United Nations Decade of Action on Nutrition | FAO & WHO |
| 2016–2025 | Third Industrial Development Decade for Africa | UNIDO |
| 2018–2027 | Third United Nations Decade for the Eradication of Poverty | United Nations |
| 2018–2028 | International Decade for Action: “Water for Sustainable Development” | United Nations |
| 2019–2028 | Nelson Mandela Decade of Peace | United Nations |
| 2019–2028 | United Nations Decade of Family Farming | FAO & IFAD |
| 2021–2030 | United Nations Decade on Ecosystem Restoration | UNEP & FAO |
| 2021–2030 | United Nations Decade of Ocean Science for Sustainable Development | UNESCO-IOC |
| 2021–2030 | Second Decade of Action for Road Safety | WHO / United Nations |
| 2021–2030 | Fourth International Decade for the Eradication of Colonialism | United Nations |
| 2021–2030 | United Nations Decade of Healthy Ageing | WHO |
| 2022–2032 | International Decade of Indigenous Languages | UNESCO |
| 2024–2033 | International Decade of Sciences for Sustainable Development | UNESCO |
| 2025–2034 | Second International Decade for People of African Descent | United Nations |
| 2025–2034 | Decade of Action for Cryospheric Sciences | UN / relevant UN agencies |
| 2025–2034 | United Nations Decade on Combating Sand and Dust Storms | UN / relevant UN agencies |
| 2026–2035 | United Nations Decade of Sustainable Transport | United Nations |
| 2026–2035 | Fourth Industrial Development Decade for Africa | UNIDO |
| 2027–2036 | International Decade of Culture for Sustainable Development | United Nations / UNESCO |
| 2027–2036 | International Decade of Strengthening of Peace for Future Generations | United Nations |
| 2027–2036 | United Nations Decade for Afforestation and Reforestation in line with Sustainable Forest Management | United Nations |
