Level III and IV Ecoregions of the Continental United States

Level III Ecoregions
Level IV Ecoregions
Ecoregions by State
Ecoregions of Multiple State Regions


Level III Ecoregions

US Level III Ecoregions
Downloads

(NOTE: maps and GIS files may differ. To make sure you are using the most current ecoregion data, download shapefiles of ecoregions)

GIS data (shapefiles, metadata and symbology):

Maps (available in PDF format):

Ecoregion Descriptions (MSWord documents):


Level IV Ecoregions

US Level IV Ecoregions Downloads

(NOTE: maps and GIS files may differ. To make sure you are using the most current ecoregion data, download shapefiles of ecoregions)


Level III and IV Ecoregions by State

Clickable map of Level III and IV Ecoregions by state: Access to Level III and IV maps, GIS data, and descriptive information can be obtained by clicking on any completed state in the status map below.

Ecoregions by US State


Level III and IV Ecoregions of Multiple State Regions based on Administrative Regions of the Environmental Protection Agency

Clickable map of Level III and IV Ecoregions of Multiple State Regions: Access to Level IV maps, GIS data, and descriptive information can be obtained by clicking on any Multiple State Region in the map below.

The correspondence between EPA Regions and Multiple State Region names is

  • Region 1 - New England
  • Region 2 - New York & New Jersey (EPA Region 2 minus Puerto Rico)
  • Region 3 - Middle Atlantic
  • Region 4 - South East
  • Region 5 - Great Lakes
  • Region 6 - South Central
  • Region 7 - Central Plains
  • Region 8 - Rockies and Northern Great Plains
  • Region 9 - South West (EPA Region 9 minus Hawaii)
  • Region 10 - Pacific North West (EPA Region 10 minus Alaska)

Ecoregions by Multiple State Region


Ecoregion Links
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