This list of Ramsar sites in the United States are those wetlands that are considered to be of international importance under the Ramsar Convention. The United States as of 2020, has 40 sites designated as "Wetlands of International Importance" with a surface area of 1,866,851 hectares (7,207.95 sq mi; 18,668.51 km²).^[1][2][3] For a full list of all Ramsar sites worldwide, see List of Ramsar wetlands of international importance.

List of Ramsar sites

Name[2]	Location	Area[2]	Designated	Description	Image
Ash Meadows National Wildlife Refuge	Nevada 36°25′N 116°20′W / 36.417°N 116.333°W / 36.417; -116.333 (Ash Meadows National Wildlife Refuge)	36.71 sq mi	18 December 1986
Bolinas Lagoon	California 37°55′N 122°41′W / 37.917°N 122.683°W / 37.917; -122.683 (Bolinas Lagoon)	1.72 sq mi	1 September 1998	A tidal estuary located on the Pacific Flyway, the lagoon provides habitat for migratory birds as well as ducks, geese, and shorebirds.
Cache-Lower White Rivers	Arkansas 34°40′N 91°11′W / 34.667°N 91.183°W / 34.667; -91.183 (Cache-Lower White Rivers)	314.19 sq mi	21 November 1989
Cache River-Cypress Creek Wetlands	Illinois 37°13′N 89°8′W / 37.217°N 89.133°W / 37.217; -89.133 (Cache River-Cypress Creek Wetlands)	93.75 sq mi	1 November 1994
Caddo Lake	Texas, Louisiana 32°45′N 94°8′W / 32.750°N 94.133°W / 32.750; -94.133 (Caddo Lake)	30.80 sq mi	23 October 1993
Catahoula Lake	Louisiana 31°30′N 92°6′W / 31.500°N 92.100°W / 31.500; -92.100 (Catahoula Lake)	46.9 sq mi	18 June 1991
Chesapeake Bay Estuarine Complex	Maryland, Virginia 38°0′N 76°20′W / 38.000°N 76.333°W / 38.000; -76.333 (Chesapeake Bay Estuarine Complex)	170 sq mi	4 June 1987
Cheyenne Bottoms	Kansas 38°29′N 98°40′W / 38.483°N 98.667°W / 38.483; -98.667 (Cheyenne Bottoms)	42.39 sq mi	19 October 1988
Chiwaukee Prairie Illinois Beach Lake Plain	Illinois Wisconsin 42°25′02″N 87°48′42″W / 42.41722°N 87.81167°W / 42.41722; -87.81167 (Chiwaukee Prairie Illinois Beach Lake Plain)	6.12 sq mi	6 October 2015	Bi-state, lake-coast lands, including Chiwaukee Prairie and Illinois Beach State Park
Congaree National Park	South Carolina 33°47′22″N 80°45′34″W / 33.78944°N 80.75944°W / 33.78944; -80.75944 (Congaree National Park)	40.69 sq mi	2 February 2012
Connecticut River Estuary and Tidal Wetlands Complex	Connecticut 41°15′N 72°18′W / 41.250°N 72.300°W / 41.250; -72.300 (Connecticut River Estuary and Tidal Wetlands Complex)	25.03 sq mi	14 October 1994
Corkscrew Swamp Sanctuary	Florida 26°24′N 81°31′W / 26.400°N 81.517°W / 26.400; -81.517 (Corkscrew Swamp Sanctuary)	20.31 sq mi	23 March 2009
Delaware Bay Estuary	Delaware, New Jersey 39°11′N 75°14′W / 39.183°N 75.233°W / 39.183; -75.233 (Delaware Bay Estuary)	197.89 sq mi	20 May 1992
Door Peninsula Coastal Wetlands	Wisconsin 45°13′20″N 85°00′00″W / 45.22222°N 85.00000°W / 45.22222; -85.00000	17.880 sq mi	6 October 2014
Edwin B. Forsythe National Wildlife Refuge	New Jersey 39°36′N 74°17′W / 39.600°N 74.283°W / 39.600; -74.283 (Edwin B. Forsythe National Wildlife Refuge)	50.5 sq mi	18 December 1986
Elkhorn Slough	California 36°49′33″N 121°45′25″W / 36.8259°N 121.7569°W / 36.8259; -121.7569 (Elkhorn Slough)	2.80 sq mi	25 June 2018
Everglades National Park	Florida 25°33′N 80°55′W / 25.550°N 80.917°W / 25.550; -80.917 (Everglades National Park)	2,357.14 sq mi	4 June 1987
Francis Beidler Forest	South Carolina 33°15′N 80°22′W / 33.250°N 80.367°W / 33.250; -80.367 (Francis Beidler Forest)	24.86 sq mi	30 May 2008
Grassland Ecological Area	California 37°10′N 120°50′W / 37.167°N 120.833°W / 37.167; -120.833 (Grassland Ecological Area)	250 sq mi	2 February 2005
Horicon Marsh	Wisconsin 43°30′N 88°38′W / 43.500°N 88.633°W / 43.500; -88.633 (Horicon Marsh)	49.85 sq mi	4 December 1990
Humbug Marsh	Michigan 42°6′N 83°11′W / 42.100°N 83.183°W / 42.100; -83.183 (Humbug Marsh)	0.73 sq mi	20 January 2010
Izembek Lagoon National Wildlife Refuge	Alaska 55°45′N 162°41′W / 55.750°N 162.683°W / 55.750; -162.683 (Izembek Lagoon National Wildlife Refuge)	650.32 sq mi	18 December 1986
Kakagon and Bad River Sloughs	Wisconsin 46°39′N 90°41′W / 46.650°N 90.683°W / 46.650; -90.683 (Kakagon and Bad River Sloughs)	16.81 sq mi	2 February 2012
Kawainui and Hamakua Marsh Complex	Hawaii 21°24′N 157°45′W / 21.400°N 157.750°W / 21.400; -157.750 (Kawainui and Hamakua Marsh Complex)	1.60 sq mi	2 February 2005
Laguna de Santa Rosa Wetland Complex	California 38°24′N 122°47′W / 38.400°N 122.783°W / 38.400; -122.783 (Laguna de Santa Rosa Wetland Complex)	6.08 sq mi	16 April 2010
Lower Wisconsin Riverway	Wisconsin 43°09′N 90°21′W / 43.150°N 90.350°W / 43.150; -90.350 (Lower Wisconsin Riverway)	68 sq mi	14 February 2020
Niagara River Corridor	New York 43°5′N 79°4′W / 43.083°N 79.067°W / 43.083; -79.067 (Niagara River Corridor)	20.261 sq mi	3 October 2019
Okefenokee National Wildlife Refuge	Georgia, Florida 30°48′N 82°20′W / 30.800°N 82.333°W / 30.800; -82.333 (Okefenokee National Wildlife Refuge)	627.94 sq mi	18 December 1986
Palmyra Atoll National Wildlife Refuge	Line Islands 5°52′N 162°6′W / 5.867°N 162.100°W / 5.867; -162.100 (Palmyra Atoll National Wildlife Refuge)	788.14 sq mi	1 April 2011
Pelican Island National Wildlife Refuge	Florida 27°48′N 80°25′W / 27.800°N 80.417°W / 27.800; -80.417 (Pelican Island National Wildlife Refuge)	7.37 sq mi	14 March 1993
Quivira National Wildlife Refuge	Kansas 38°5′N 98°29′W / 38.083°N 98.483°W / 38.083; -98.483 (Quivira National Wildlife Refuge)	34.59 sq mi	12 February 2002	The refuge has 34 wetlands and includes two shallow lakes, Big Salt Marsh and Little Salt Marsh. More than half of the refuge is Tallgrass and Shortgrass prairies.
Roswell Artesian Wetlands	New Mexico 33°27′N 104°23′W / 33.450°N 104.383°W / 33.450; -104.383 (Roswell Artesian Wetlands)	3.54 sq mi	7 September 2010
San Francisco Bay and Estuary	California 37°52′N 122°23′W / 37.867°N 122.383°W / 37.867; -122.383 (San Francisco Bay and Estuary)	612.79 sq mi	2 February 2013
Sand Lake National Wildlife Refuge	South Dakota 45°45′N 98°15′W / 45.750°N 98.250°W / 45.750; -98.250 (Sand Lake National Wildlife Refuge)	34 sq mi	3 August 1998
Sue and Wes Dixon Waterfowl Refuge at Hennepin and Hopper Lake	Illinois 41°13′20″N 89°20′17″W / 41.22222°N 89.33806°W / 41.22222; -89.33806 (Dixon Waterfowl Refuge)	4.31 sq mi	2 February 2012
The Emiquon Complex	Illinois 40°21′22″N 90°3′10″W / 40.35611°N 90.05278°W / 40.35611; -90.05278 (The Emiquon Complex)	22.12 sq mi	2 February 2012
Tijuana River National Estuarine Research Reserve	California 32°33′N 117°7′W / 32.550°N 117.117°W / 32.550; -117.117 (Tijuana River National Estuarine Research Reserve)	3.94 sq mi	2 February 2005
Tomales Bay	California 38°9′N 123°23′W / 38.150°N 123.383°W / 38.150; -123.383 (Tomales Bay)	28.5 km2 (11.0 sq mi)	30 September 2002
Upper Mississippi River Floodplain Wetlands	Minnesota, Wisconsin, Iowa, Illinois 43°3′N 91°10′W / 43.050°N 91.167°W / 43.050; -91.167 (Upper Mississippi River Floodplain Wetlands)	472.42 sq mi	5 January 2010
Wilma H. Schiermeier Olentangy River Wetland Research Park	Ohio 40°1′N 83°1′W / 40.017°N 83.017°W / 40.017; -83.017 (Olentangy River Wetland Research Park)	0.081 sq mi	18 April 2008