The World Toilet Organization (WTO) is a global non-profit organization whose goal is to improve toilet and sanitation conditions worldwide. It was founded in 2001 with 15 members and has now grown to 151 member organizations in 53 countries. The WTO is also the organizer of the World Toilet Summit, the Urgent Run and initiated the United Nations World Toilet Day.

World Toilet Day (WTD) is an official United Nations international observance day on 19 November to inspire action to tackle the global sanitation crisis. Worldwide, 4.2 billion people live without "safely managed sanitation" and around 673 million people practice open defecation. Sustainable Development Goal 6 aims to "Ensure availability and sustainable management of water and sanitation for all". In particular, target 6.2 is to "End open defecation and provide access to sanitation and hygiene". When the Sustainable Development Goals Report 2020 was published, United Nations Secretary-General António Guterres said, "Today, Sustainable Development Goal 6 is badly off track" and it "is hindering progress on the 2030 Agenda, the realization of human rights and the achievement of peace and security around the world".