List of ecoregions in the United States (WWF)
This is a list of terrestrial ecoregions of the 50 United States, as defined by the World Wildlife Fund:
Realm | Biome | Ecoregion | State |
Nearctic | Tropical and subtropical coniferous forests | Sierra Madre Occidental pine-oak forests | Arizona |
Nearctic | Tropical and subtropical coniferous forests | Sierra Madre Occidental pine-oak forests | New Mexico |
Nearctic | Tropical and subtropical coniferous forests | Sierra Madre Oriental pine-oak forests | Texas |
Nearctic | Temperate broadleaf and mixed forests | Allegheny Highlands forests | New Jersey |
Nearctic | Temperate broadleaf and mixed forests | Allegheny Highlands forests | New York |
Nearctic | Temperate broadleaf and mixed forests | Allegheny Highlands forests | Ohio |
Nearctic | Temperate broadleaf and mixed forests | Allegheny Highlands forests | Pennsylvania |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Alabama |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Georgia |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Kentucky |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Maryland |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | North Carolina |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Ohio |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Pennsylvania |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Tennessee |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | Virginia |
Nearctic | Temperate broadleaf and mixed forests | Appalachian mixed mesophytic forests | West Virginia |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | Alabama |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | Georgia |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | Maryland |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | New Jersey |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | New York |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | North Carolina |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | Pennsylvania |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | South Carolina |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | Tennessee |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | Virginia |
Nearctic | Temperate broadleaf and mixed forests | Appalachian-Blue Ridge forests | West Virginia |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Alabama |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Arkansas |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Illinois |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Indiana |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Kentucky |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Mississippi |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Missouri |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Ohio |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Oklahoma |
Nearctic | Temperate broadleaf and mixed forests | Central U.S. hardwood forests | Tennessee |
Nearctic | Temperate broadleaf and mixed forests | East Central Texas forests | Texas |
Nearctic | Temperate broadleaf and mixed forests | Eastern Great Lakes lowland forests | New York |
Nearctic | Temperate broadleaf and mixed forests | Eastern Great Lakes lowland forests | Vermont |
Nearctic | Temperate broadleaf and mixed forests | Eastern forest-boreal transition | New York |
Nearctic | Temperate broadleaf and mixed forests | Mississippi lowland forests | Arkansas |
Nearctic | Temperate broadleaf and mixed forests | Mississippi lowland forests | Illinois |
Nearctic | Temperate broadleaf and mixed forests | Mississippi lowland forests | Kentucky |
Nearctic | Temperate broadleaf and mixed forests | Mississippi lowland forests | Louisiana |
Nearctic | Temperate broadleaf and mixed forests | Mississippi lowland forests | Mississippi |
Nearctic | Temperate broadleaf and mixed forests | Mississippi lowland forests | Missouri |
Nearctic | Temperate broadleaf and mixed forests | Mississippi lowland forests | Tennessee |
Nearctic | Temperate broadleaf and mixed forests | New England-Acadian forests | Connecticut |
Nearctic | Temperate broadleaf and mixed forests | New England-Acadian forests | Maine |
Nearctic | Temperate broadleaf and mixed forests | New England-Acadian forests | Massachusetts |
Nearctic | Temperate broadleaf and mixed forests | New England-Acadian forests | New Hampshire |
Nearctic | Temperate broadleaf and mixed forests | New England-Acadian forests | New York |
Nearctic | Temperate broadleaf and mixed forests | New England-Acadian forests | Vermont |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Connecticut |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Delaware |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Maine |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Maryland |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Massachusetts |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | New Hampshire |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | New Jersey |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | New York |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Pennsylvania |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Rhode Island |
Nearctic | Temperate broadleaf and mixed forests | Northeastern coastal forests | Vermont |
Nearctic | Temperate broadleaf and mixed forests | Ozark Mountain forests | Arkansas |
Nearctic | Temperate broadleaf and mixed forests | Ozark Mountain forests | Oklahoma |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Alabama |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Georgia |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Louisiana |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Maryland |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Mississippi |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | North Carolina |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Pennsylvania |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | South Carolina |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Tennessee |
Nearctic | Temperate broadleaf and mixed forests | Southeastern mixed forests | Virginia |
Nearctic | Temperate broadleaf and mixed forests | Southern Great Lakes forests | Indiana |
Nearctic | Temperate broadleaf and mixed forests | Southern Great Lakes forests | Michigan |
Nearctic | Temperate broadleaf and mixed forests | Southern Great Lakes forests | New York |
Nearctic | Temperate broadleaf and mixed forests | Southern Great Lakes forests | Ohio |
Nearctic | Temperate broadleaf and mixed forests | Southern Great Lakes forests | Pennsylvania |
Nearctic | Temperate broadleaf and mixed forests | Upper Midwest forest-savanna transition | Illinois |
Nearctic | Temperate broadleaf and mixed forests | Upper Midwest forest-savanna transition | Iowa |
Nearctic | Temperate broadleaf and mixed forests | Upper Midwest forest-savanna transition | Michigan |
Nearctic | Temperate broadleaf and mixed forests | Upper Midwest forest-savanna transition | Minnesota |
Nearctic | Temperate broadleaf and mixed forests | Upper Midwest forest-savanna transition | Wisconsin |
Nearctic | Temperate broadleaf and mixed forests | Western Great Lakes forests | Michigan |
Nearctic | Temperate broadleaf and mixed forests | Western Great Lakes forests | Minnesota |
Nearctic | Temperate broadleaf and mixed forests | Western Great Lakes forests | Wisconsin |
Nearctic | Temperate broadleaf and mixed forests | Willamette Valley forests | Oregon |
Nearctic | Temperate broadleaf and mixed forests | Willamette Valley forests | Washington |
Nearctic | Temperate coniferous forests | Arizona Mountains forests | Arizona |
Nearctic | Temperate coniferous forests | Arizona Mountains forests | New Mexico |
Nearctic | Temperate coniferous forests | Arizona Mountains forests | Texas |
Nearctic | Temperate coniferous forests | Atlantic coastal pine barrens | Massachusetts |
Nearctic | Temperate coniferous forests | Atlantic coastal pine barrens | New Jersey |
Nearctic | Temperate coniferous forests | Atlantic coastal pine barrens | New York |
Nearctic | Temperate coniferous forests | Blue Mountains forests | Idaho |
Nearctic | Temperate coniferous forests | Blue Mountains forests | Oregon |
Nearctic | Temperate coniferous forests | Blue Mountains forests | Washington |
Nearctic | Temperate coniferous forests | British Columbia mainland coastal forests | Washington |
Nearctic | Temperate coniferous forests | Cascade Mountains leeward forests | Washington |
Nearctic | Temperate coniferous forests | Central Pacific coastal forests | Oregon |
Nearctic | Temperate coniferous forests | Central Pacific coastal forests | Washington |
Nearctic | Temperate coniferous forests | Central and Southern Cascades forests | Oregon |
Nearctic | Temperate coniferous forests | Central and Southern Cascades forests | Washington |
Nearctic | Temperate coniferous forests | Colorado Rockies forests | Colorado |
Nearctic | Temperate coniferous forests | Colorado Rockies forests | New Mexico |
Nearctic | Temperate coniferous forests | Colorado Rockies forests | Wyoming |
Nearctic | Temperate coniferous forests | Eastern Cascades forests | California |
Nearctic | Temperate coniferous forests | Eastern Cascades forests | Oregon |
Nearctic | Temperate coniferous forests | Eastern Cascades forests | Washington |
Nearctic | Temperate coniferous forests | Florida sand pine scrub | Florida |
Nearctic | Temperate coniferous forests | Great Basin montane forests | California |
Nearctic | Temperate coniferous forests | Great Basin montane forests | Nevada |
Nearctic | Temperate coniferous forests | Great Basin montane forests | Oregon |
Nearctic | Temperate coniferous forests | Klamath-Siskiyou forests | California |
Nearctic | Temperate coniferous forests | Klamath-Siskiyou forests | Oregon |
Nearctic | Temperate coniferous forests | Middle Atlantic coastal forests | Delaware |
Nearctic | Temperate coniferous forests | Middle Atlantic coastal forests | Georgia |
Nearctic | Temperate coniferous forests | Middle Atlantic coastal forests | Maryland |
Nearctic | Temperate coniferous forests | Middle Atlantic coastal forests | North Carolina |
Nearctic | Temperate coniferous forests | Middle Atlantic coastal forests | South Carolina |
Nearctic | Temperate coniferous forests | Middle Atlantic coastal forests | Virginia |
Nearctic | Temperate coniferous forests | North Central Rockies forests | Idaho |
Nearctic | Temperate coniferous forests | North Central Rockies forests | Montana |
Nearctic | Temperate coniferous forests | North Central Rockies forests | Washington |
Nearctic | Temperate coniferous forests | Northern California coastal forests | California |
Nearctic | Temperate coniferous forests | Northern California coastal forests | Oregon |
Nearctic | Temperate coniferous forests | Northern Pacific coastal forests | Alaska |
Nearctic | Temperate coniferous forests | Okanogan dry forests | Washington |
Nearctic | Temperate coniferous forests | Piney Woods forests | Arkansas |
Nearctic | Temperate coniferous forests | Piney Woods forests | Louisiana |
Nearctic | Temperate coniferous forests | Piney Woods forests | Oklahoma |
Nearctic | Temperate coniferous forests | Piney Woods forests | Texas |
Nearctic | Temperate coniferous forests | Puget lowland forests | Washington |
Nearctic | Temperate coniferous forests | Sierra Nevada forests | California |
Nearctic | Temperate coniferous forests | Sierra Nevada forests | Nevada |
Nearctic | Temperate coniferous forests | South Central Rockies forests | Montana |
Nearctic | Temperate coniferous forests | South Central Rockies forests | South Dakota |
Nearctic | Temperate coniferous forests | South Central Rockies forests | Wyoming |
Nearctic | Temperate coniferous forests | Southeastern conifer forests | Alabama |
Nearctic | Temperate coniferous forests | Southeastern conifer forests | Florida |
Nearctic | Temperate coniferous forests | Southeastern conifer forests | Georgia |
Nearctic | Temperate coniferous forests | Southeastern conifer forests | Louisiana |
Nearctic | Temperate coniferous forests | Southeastern conifer forests | Mississippi |
Nearctic | Temperate coniferous forests | Wasatch and Uinta montane forests | Idaho |
Nearctic | Temperate coniferous forests | Wasatch and Uinta montane forests | Utah |
Nearctic | Temperate coniferous forests | Wasatch and Uinta montane forests | Wyoming |
Nearctic | Boreal forests/taiga | Alaska Peninsula montane taiga | Alaska |
Nearctic | Boreal forests/taiga | Cook Inlet taiga | Alaska |
Nearctic | Boreal forests/taiga | Copper Plateau taiga | Alaska |
Nearctic | Boreal forests/taiga | Interior Alaska-Yukon lowland taiga | Alaska |
Nearctic | Tropical and subtropical grasslands, savannas, and shrublands | Western Gulf coastal grasslands | Louisiana |
Nearctic | Tropical and subtropical grasslands, savannas, and shrublands | Western Gulf coastal grasslands | Mississippi |
Nearctic | Tropical and subtropical grasslands, savannas, and shrublands | Western Gulf coastal grasslands | Texas |
Nearctic | Temperate grasslands, savannas, and shrublands | California Central Valley grasslands | California |
Nearctic | Temperate grasslands, savannas, and shrublands | Canadian aspen forests and parklands | Minnesota |
Nearctic | Temperate grasslands, savannas, and shrublands | Canadian aspen forests and parklands | North Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Central and Southern mixed grasslands | Kansas |
Nearctic | Temperate grasslands, savannas, and shrublands | Central and Southern mixed grasslands | Nebraska |
Nearctic | Temperate grasslands, savannas, and shrublands | Central and Southern mixed grasslands | Oklahoma |
Nearctic | Temperate grasslands, savannas, and shrublands | Central and Southern mixed grasslands | Texas |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Illinois |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Indiana |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Iowa |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Kansas |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Missouri |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Oklahoma |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Texas |
Nearctic | Temperate grasslands, savannas, and shrublands | Central forest-grasslands transition | Wisconsin |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | Iowa |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | Kansas |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | Minnesota |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | Missouri |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | Nebraska |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | North Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | South Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Central tall grasslands | Wisconsin |
Nearctic | Temperate grasslands, savannas, and shrublands | Edwards Plateau savanna | Texas |
Nearctic | Temperate grasslands, savannas, and shrublands | Flint Hills tall grasslands | Kansas |
Nearctic | Temperate grasslands, savannas, and shrublands | Flint Hills tall grasslands | Oklahoma |
Nearctic | Temperate grasslands, savannas, and shrublands | Montana Valley and Foothill grasslands | Montana |
Nearctic | Temperate grasslands, savannas, and shrublands | Nebraska Sand Hills mixed grasslands | Nebraska |
Nearctic | Temperate grasslands, savannas, and shrublands | Nebraska Sand Hills mixed grasslands | South Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern mixed grasslands | Nebraska |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern mixed grasslands | North Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern mixed grasslands | South Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern short grasslands | Montana |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern short grasslands | Nebraska |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern short grasslands | North Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern short grasslands | South Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern short grasslands | Wyoming |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern tall grasslands | Minnesota |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern tall grasslands | North Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Northern tall grasslands | South Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Palouse grasslands | Idaho |
Nearctic | Temperate grasslands, savannas, and shrublands | Palouse grasslands | Oregon |
Nearctic | Temperate grasslands, savannas, and shrublands | Palouse grasslands | Washington |
Nearctic | Temperate grasslands, savannas, and shrublands | Texas blackland prairies | Texas |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | Colorado |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | Kansas |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | Nebraska |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | New Mexico |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | Oklahoma |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | South Dakota |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | Texas |
Nearctic | Temperate grasslands, savannas, and shrublands | Western short grasslands | Wyoming |
Nearctic | Tundra | Alaska-St. Elias Range tundra | Alaska |
Nearctic | Tundra | Aleutian Islands tundra | Alaska |
Nearctic | Tundra | Arctic coastal tundra | Alaska |
Nearctic | Tundra | Arctic foothills tundra | Alaska |
Nearctic | Tundra | Beringia lowland tundra | Alaska |
Nearctic | Tundra | Beringia upland tundra | Alaska |
Nearctic | Tundra | Brooks-British Range tundra | Alaska |
Nearctic | Tundra | Interior Yukon-Alaska alpine tundra | Alaska |
Nearctic | Tundra | Ogilvie-MacKenzie alpine tundra | Alaska |
Nearctic | Tundra | Pacific Coastal Mountain icefields and tundra | Alaska |
Nearctic | Mediterranean forests, woodlands, and shrub | California coastal sage and chaparral | California |
Nearctic | Mediterranean forests, woodlands, and shrub | California interior chaparral and woodlands | California |
Nearctic | Mediterranean forests, woodlands, and shrub | California montane chaparral and woodlands | California |
Nearctic | Deserts and xeric shrublands | Chihuahuan desert | Arizona |
Nearctic | Deserts and xeric shrublands | Chihuahuan desert | New Mexico |
Nearctic | Deserts and xeric shrublands | Chihuahuan desert | Texas |
Nearctic | Deserts and xeric shrublands | Colorado Plateau shrublands | Arizona |
Nearctic | Deserts and xeric shrublands | Colorado Plateau shrublands | Colorado |
Nearctic | Deserts and xeric shrublands | Colorado Plateau shrublands | New Mexico |
Nearctic | Deserts and xeric shrublands | Colorado Plateau shrublands | Utah |
Nearctic | Deserts and xeric shrublands | Great Basin shrub steppe | California |
Nearctic | Deserts and xeric shrublands | Great Basin shrub steppe | Idaho |
Nearctic | Deserts and xeric shrublands | Great Basin shrub steppe | Nevada |
Nearctic | Deserts and xeric shrublands | Great Basin shrub steppe | Utah |
Nearctic | Deserts and xeric shrublands | Mojave desert | Arizona |
Nearctic | Deserts and xeric shrublands | Mojave desert | California |
Nearctic | Deserts and xeric shrublands | Mojave desert | Nevada |
Nearctic | Deserts and xeric shrublands | Mojave desert | Utah |
Nearctic | Deserts and xeric shrublands | Snake-Columbia shrub steppe | California |
Nearctic | Deserts and xeric shrublands | Snake-Columbia shrub steppe | Idaho |
Nearctic | Deserts and xeric shrublands | Snake-Columbia shrub steppe | Nevada |
Nearctic | Deserts and xeric shrublands | Snake-Columbia shrub steppe | Oregon |
Nearctic | Deserts and xeric shrublands | Snake-Columbia shrub steppe | Washington |
Nearctic | Deserts and xeric shrublands | Sonoran desert | Arizona |
Nearctic | Deserts and xeric shrublands | Sonoran desert | California |
Nearctic | Deserts and xeric shrublands | Tamaulipan mezquital | Texas |
Nearctic | Deserts and xeric shrublands | Wyoming Basin shrub steppe | Colorado |
Nearctic | Deserts and xeric shrublands | Wyoming Basin shrub steppe | Idaho |
Nearctic | Deserts and xeric shrublands | Wyoming Basin shrub steppe | Montana |
Nearctic | Deserts and xeric shrublands | Wyoming Basin shrub steppe | Utah |
Nearctic | Deserts and xeric shrublands | Wyoming Basin shrub steppe | Wyoming |
Neotropical | Tropical and subtropical moist broadleaf forests | South Florida rocklands | Florida |
Neotropical | Flooded grasslands and savannas | Everglades | Florida |
Oceanian | Tropical and subtropical moist broadleaf forests | Hawaiian tropical rainforests | Hawaii |
Oceanian | Tropical and subtropical dry broadleaf forests | Hawaiian tropical dry forests | Hawaii |
Oceanian | Tropical and subtropical grasslands, savannas, and shrublands | Hawaiian tropical high shrublands | Hawaii |
Oceanian | Tropical and subtropical grasslands, savannas, and shrublands | Hawaiian tropical low shrublands | Hawaii |
Oceanian | Tropical and subtropical grasslands, savannas, and shrublands | Northwestern Hawaii scrub | Hawaii |