This data set shows ecoregions, which are ecosystems of
regional extent, in the United States, Puerto Rico, and the U.S. Virgin
Islands. Four levels of detail are included to show a hierarchy of ecosystems.
The largest ecosystems are domains, which are groups of related climates and
which are differentiated based on precipitation and temperature. Divisions
represent the climates within domains and are differentiated based on
precipitation levels and patterns as well as temperature. Divisions are
subdivided into provinces, which are differentiated based on vegetation or
other natural land covers. The finest level of detail is described by
subregions, called sections, which are subdivisions of provinces based on
terrain features. Also identified are mountainous areas that exhibit different
ecological zones based on elevation.
Download GIS Data Sets
The USDA Forest Service and the National Atlas of the United States® have collaborated to create, and deliver for download, the following GIS data sets:
Download Sample Maps
The map of the Ecoregions of the United States is available for download in the following formats and sizes below. Here is a
|8.5 x 11 inch||11 x 17 inch|
|ai (Adobe Illustrator)||ai (Adobe Illustrator)|
National Atlas of the United States
Ecoregions of the United States are now incorporated into the online digital National Atlas of the United States®. (Ecoregions are located under the +Biology category).