Ecoregions of North America

North America has been divided into:

  • 15 broad, level I ecological regions;
  • 50 level II ecological regions intended to provide a more detailed description of the large ecological areas nested within the level I regions; and
  • 182 Level III ecoregions, which are smaller ecological areas nested within level II regions.

Select a link for additional details about each level, or a list of links to downloadable maps and GIS data files.