National Wetlands Inventory

National Spatial Data Infrastructure (NSDI) Wetlands Layer:

Visit the Wetlands Layer index page for more information.

Contact Information:

You can also email the FWS Customer Service Center, or call 1.800.344.WILD (1.800.344.9453).

Download Seamless Wetlands Data

number 1

Read First


Please read the Disclaimer, Data Limitations, Exclusions and Precautions, and the Wetlands Geodatabase User Caution.


number 1



With each download you will receive a .zip file that contains the following layers:

  • NWI wetland polygon data
  • NWI riparian polygon data (if available at the requested location)
  • Metadata ( NWI project metadata including image dates used for delineation)

Please Note:

  • ArcGIS version 10.* is required for Geodatabase downloads.
  • State data downloaded will be in an equal area Albers projection with a North American Datum (NAD) of 1983. Mapper data downloaded by Extent will be in WGS 1984 Web Mercator projection. 

There are two methods for downloading seamless wetlands data as viewed on the Wetlands Mapper:

mapper icon

Wetlands Mapper

The Wetlands Mapper Download Data by Extent tool uses the Wetlands Mapper to create a ZIP file containing a compressed file Geodatabase and Shapefile of the current visible extent. A web link for downloading the file will be sent by email. This tool is available by visiting the Wetlands Mapper, zooming to an area of interest, then selecting the Download Data in Current Extent tool from the Tools menu.

US States

Data by State

Each State dataset is available for download as either a compressed file Geodatabase or a Shapefile


number 1

View Data


You can view the Geodatabase and Shapefiles by using ESRI's ArcGis Explorer free software, among others. Please note that ArcGIS version 10.* is required for Geodatabase downloads.

Last updated: