The World Water Council (WWC), also known as the Conseil Mondial de l'Eau (CME), is an international think tank. It was founded in 1996, with its headquarters in Marseille, France. It has 358 members (as of February 2020) which encompass organisations from the UN and intergovernmental organizations, the private sector (construction, engineering and manufacturing companies), governments and ministries, academic institutions, international organizations, local governments and civil society groups. Founders and constituent members of the World Water Council are the International Commission on Irrigation and Drainage, the International Union for Conservation of Nature (IUCN), the International Water Association (IWA), AquaFed (The International Federation of Private Water Operators), Suez Lyonnaise des Eaux, the United Nations agencies UNDP and UNESCO, as well as the World Bank.

Its stated mission is "to promote awareness, build political commitment and trigger action on critical water issues at all levels, including the highest decision-making level, to facilitate the efficient conservation, protection, development, planning, management, and use of water in all its dimensions on an environmentally sustainable basis for the benefit of all life on earth."

Every third year the World Water Council organizes the World Water Forum in close collaboration with the authorities of the hosting country. The Forum is the largest international event in the field of water. The 6th World Water Forum took place in Marseille, France, in 2012 and the 7th World Water Forum in Daegu-Gyeongbuk, Republic of Korea, in April 2015. The 8th World Water Forum took place in Brasilia, Brazil, from 18 to 23 March 2018 under the overarching theme 'Sharing Water'. The 9th World Water Forum will be held in Dakar, Senegal, in March 2021.

The World Water Council is financed primarily through membership fees, and additional support is provided by the host City of Marseille. Specific projects and programs are financed through donations and grants from governments, international organizations, and NGOs.