importance included 2,531 Ramsar sites in February 2025 covering over . The countries with most sites are the United Kingdom with 175 and Mexico with 142. The country with the largest surface area of listed wetland is Brazil, with around .

The Ramsar Sites Information Service (RSIS) is a searchable database which provides information on each Ramsar site.

International cooperation

As of 2016 there are 18 transboundary Ramsar sites, and 15 Ramsar regional initiatives covering regions

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