List of ecoregions in the United States (WWF)

For an alternate classification system, see List of ecoregions in the United States (EPA).

This is a list of terrestrial ecoregions of the 50 United States, as defined by the World Wildlife Fund:

Ecozone	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
Neotropic	Tropical and subtropical moist broadleaf forests	South Florida rocklands	Florida
Neotropic	Flooded grasslands and savannas	Everglades	Florida
Oceania	Tropical and subtropical moist broadleaf forests	Hawaiian tropical rainforests	Hawaii
Oceania	Tropical and subtropical dry broadleaf forests	Hawaiian tropical dry forests	Hawaii
Oceania	Tropical and subtropical grasslands, savannas, and shrublands	Hawaiian tropical high shrublands	Hawaii
Oceania	Tropical and subtropical grasslands, savannas, and shrublands	Hawaiian tropical low shrublands	Hawaii
Oceania	Tropical and subtropical grasslands, savannas, and shrublands	Northwestern Hawaii scrub	Hawaii

References

Ricketts, Taylor H; Eric Dinerstein; David M. Olson; Colby J. Loucks; et al. (1999). Terrestrial Ecoregions of North America: a Conservation Assessment. Island Press; Washington, DC.

Level III Ecoregions in the United States

Marine West Coast Forest	1 Coast Range 2 Puget Lowland 3 Willamette Valley 111 Ahklun and Kilbuck Mountains 113 Alaska Peninsula Mountains 115 Cook Inlet 119 Pacific Coastal Mountains 120 Coastal Western Hemlock-Sitka Spruce Forests

Northwestern Forested Mountains	4 Cascades 5 Sierra Nevada 9 Eastern Cascades Slopes and Foothills 11 Blue Mountains 15 Northern Rockies 16 Idaho Batholith 17 Middle Rockies 19 Wasatch and Uinta Mountains 21 Southern Rockies 41 Canadian Rockies 77 North Cascades 78 Klamath Mountains 105 Interior Highlands 116 Alaska Range 117 Copper Plateau 118 Wrangell Mountains

Mediterranean California	6 Southern and Central California Chaparral and Oak Woodlands 7 Central California Valley 8 Southern California Mountains

North American Deserts	10 Columbia Plateau 12 Snake River Plain 13 Central Basin and Range 14 Mojave Basin and Range 18 Wyoming Basin 20 Colorado Plateaus 22 Arizona/New Mexico Plateau 24 Chihuahuan Deserts 80 Northern Basin and Range 81 Sonoran Basin and Range

Temperate Sierras	23 Arizona/New Mexico Mountains

Great Plains	25 Western High Plains 26 Southwestern Tablelands 27 Central Great Plains 28 Flint Hills 29 Central Oklahoma/Texas Plains 30 Edwards Plateau 31 Southern Texas Plains 34 Western Gulf Coastal Plain 40 Central Irregular Plains 42 Northwestern Glaciated Plains 43 Northwestern Great Plains 44 Nebraska Sand Hills 45 Piedmont 46 Northern Glaciated Plains 47 Western Corn Belt Plains 48 Lake Agassiz Plain

Eastern Temperate Forest	32 Texas Blackland Prairies 33 East Central Texas Plains 35 South Central Plains 36 Ouachita Mountains 37 Arkansas Valley 38 Boston Mountains 39 Ozark Highlands 51 North Central Hardwood Forests 52 Driftless Area 53 Southeastern Wisconsin Till Plains 54 Central Corn Belt Plains 55 Eastern Corn Belt Plains 56 Southern Michigan/Northern Indiana Drift Plains 57 Huron/Erie Lake Plains 59 Northeastern Coastal Zone 60 Northern Appalachian Plateau and Uplands 61 Erie Drift Plain 63 Middle Atlantic Coastal Plain 64 Northern Piedmont 65 Southeastern Plains 66 Blue Ridge 67 Ridge and Valley 68 Southwestern Appalachians 69 Central Appalachians 70 Western Allegheny Plateau 71 Interior Plateau 72 Interior River Valleys and Hills 73 Mississippi Alluvial Plain 74 Mississippi Valley Loess Plains 75 Southern Coastal Plain 82 Laurentian Plains and Hills 83 Eastern Great Lakes and Hudson Lowlands 84 Atlantic Coastal Pine Barrens

Northern Forests	49 Northern Minnesota Wetlands 50 Northern Lakes and Forests 58 Northeastern Highlands 62 North Central Appalachians

Tropical Wet Forests	76 Southern Florida Coastal Plain

Southern Semi-Arid Highlands	79 Madrean Archipelago

Taiga	101 Arctic Coastal Plain 102 Arctic Foothills 103 Brooks Range 104 Interior Forested Lowlands and Uplands 106 Interior Bottomlands 107 Yukon Flats 108 Ogilvie Mountains

Tundra	109 Subarctic Coastal Plains 110 Seward Peninsula 112 Bristol Bay-Nushagak Lowlands 114 Aleutian Islands

as defined by the United States Environmental Protection Agency

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List of ecoregions in the United States (WWF)

See also

References