Wetland Maps and Data

Information on the status and trends of our nation's wetlands are compiled by the United States Fish and Wildlife Service's (USFWS) National Wetland Inventory. The National Wetland Inventory has mapped wetlands based on map units as defined in Classification of Wetlands and Deepwater Habitats of the United States (Cowardin et al. 1979). Wetlands are mapped as lines, points, and polygons and final digitized maps are available for download on the USFWS web site.