Lists of ecoregions
# 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
