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).

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Wetlands Mapper
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Wetlands provide a multitude of ecological, economic and social benefits. They provide habitat for fish, wildlife and a variety of plants. Wetlands are nurseries for many saltwater and freshwater fishes and shellfish of commercial and recreational importance. Wetlands are also important landscape features because they hold and slowly release flood water and snow melt, recharge groundwater, recycle nutrients, and provide recreation and wildlife viewing opportunities for millions of people.

Latest News and Reports
Visit our News page for a complete list of News.
Status and Trends Report iconStatus and Trends of Prairie Wetlands Report Released 
The Status and Trends of Prairie Wetlands in the United States 1997 to 2009  was released on 30 June, 2014.  This report estimates that 6,427,350 acres of wetlands remained in the Prairie Pothole Region in 2009, which represents 5.8 % of the total wetland area found in the conterminous U.S. in 2009. Between 1997 and 2009, the average annual rate of change was an estimated loss of 6,200 acres and an estimated 40 % of emergent wetland area was lost or converted to deepwater lake systems or open-water ponds. Click here to download the report (17MB PDF); News Release (PDF); Questions and Answers (6MB PDF); Fact Sheet (PDF).
Mapper iconWetlands Digital Data Completed for the Conterminous 48 States
May is American Wetlands Month, a time to celebrate and recognize how they enrich our lives and contribute to the health of our environment. In a fitting tribute to wetlands, the U.S. Fish and Wildlife Service’s National Wetlands Inventory is announcing the completion of the digital wetland coverage for the conterminous 48 States, Hawaii, Puerto Rico, the Virgin Islands, Guam, the major Northern Mariana Islands and 35 % of Alaska. This digital wetlands data can viewed on the Wetlands Mapper, is available for download and via web map services. View the News Release (PDF).
Coastal Watershed photo iconNew Coastal Wetlands Report Announced
The Status and Trends of Wetlands in the Coastal Watersheds of the Conterminous United States 2004 to 2009  was released on November 21, 2013. This report is a joint effort with the National Oceanic and Atmospheric Administration and was also funded in part by the U.S. Environmental Protection Agency. This report tracked wetland loss in the watersheds of the Pacific, Atlantic, and Gulf coasts, as well as the Great Lakes. It concludes that more than 80,000 acres of coastal wetlands are being lost on average each year, up from 60,000 acres lost per year during the previous study. Click here to download the report (12MB PDF); News Release (PDF); Questions and Answers (PDF); Fact Sheet (PDF).
SWI map iconSurface Waters and Wetlands Inventory – Coming Soon!
Often referred to as Version 2.0 of the National Wetlands Inventory, the Surface Waters and Wetlands Inventory provides more inclusive geospatial data of all wetlands and surface water features. This national geospatial data product will contribute substantially to improved modeling of flow and water movement in surface water basins, channels, and wetlands.  For more information visit the SWI Product Summary web page.
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