This list of Ramsar wetlands of Thailand comprises Thai wetlands deemed to be of "international importance" under the Ramsar Convention. For a full list of all Ramsar sites worldwide, see the Ramsar list of wetlands of international importance. As of 2020 there are 15 Ramsar sites in Thailand, totalling 405,219 hectares. According to WWF, wetlands are one of the most threatened of all ecosystems, because of progressive loss of vegetation, salinization, excessive inundation, water pollution, invasive species, development, and road building.