Lists of ecoregions

Wikipedia has articles relating to two separate ecoregion classification systems:

Ecoregions defined by the Commission for Environmental Cooperation (CEC) and partner agencies in Canada, Mexico, and the United States:
- List of ecoregions in North America (CEC)
- List of ecoregions in the United States (EPA)
Ecoregions of the world defined by the conservation group World Wildlife Fund (WWF) :
- Global 200 ecoregions (WWF), 238 single or combined ecoregions identified by the World Wildlife Fund (WWF) as priorities for conservation.
- List of terrestrial ecoregions (WWF) 867 terrestrial ecoregions.
- List of marine ecoregions (WWF), 232 marine ecoregions of the coastal and continental shelf areas.
- List of freshwater ecoregions (WWF), 426 freshwater ecoregions.
- Lists of ecoregions by country

Polar/montane	Tundra Taiga Montane grasslands and shrublands Alpine tundra
Temperate	Coniferous forests Broadleaf and mixed forests Deciduous forests Grasslands, savannas, and shrublands
Tropical and subtropical	Tropical rainforest Coniferous forests Moist broadleaf forests Dry broadleaf forests Grasslands, savannas, and shrublands
Dry	Mediterranean forests, woodlands, and scrub Deserts and xeric shrublands Steppe
Wet	Flooded grasslands and savannas Riparian Wetland Mangrove

Aquatic
biomes

Other biomes

Biogeographic
realms

Terrestrial	Afrotropical Antarctic Australasian Holarctic Indomalayan Nearctic Neotropical Oceanian Palearctic
Marine	Antarctic/Southern Ocean Arctic Central Indo-Pacific Eastern Indo-Pacific Temperate Australasia Temperate Northern Atlantic Temperate Northern Pacific Temperate South America Temperate Southern Africa Tropical Atlantic Tropical Eastern Pacific Western Indo-Pacific
Subdivisions	Biogeographic provinces Bioregions Ecoregions Lists of ecoregions Global 200 ecoregions