USFWSNational Wetlands Inventory

NWI digital data files are records of wetlands location and classification as developed by the U.S. Fish & Wildlife Service. The classification system was adopted as a national classification standard in 1996 by the Federal Geographic Data Committee.

Download Seamless MS Statewide Wetlands Data shapefile:

Sept. 2011 Update – 1.17GB: (
Status Map – (NWI_Status.gif)

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)

More detailed metadata - >

State data downloaded will be in Albers projection with a North American Datum (NAD) of 1983.

For custom extractions of sub-state level and more detailed information on the process-    Mapper data downloaded by Extent will be in WGS 1984 Web Mercator.