USDA Forest Service

Forest Inventory & Analysis
National Office
U.S. Forest Service
1400 Independence Ave., SW
Washington, D.C. 20250-0003

(703) 605-4177

United States Department of Agriculture Forest Service.

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User Alert:

Jan 15, 2020: FIA tools and data will be unavailable for a short period on Sunday, January 26, 2020, due to server system maintenance. We apologize for any inconvenience.

Nov 5, 2019: Links to the Carbon On-Line Estimator (COLE) and Southern On-Line Estimator (SOLE) tools have been removed from the Data  & Tools page of our site. These tools, developed and maintained by National Council for Air and Stream Improvement, Inc (NCASI), have been unavailable for some time now and are no longer being supported.

May 29, 2019: EVALIDator users:
Users running ratio reports using growth, removals or mortality estimates should ensure they select “Output estimates and sampling errors”. If “Output estimates” only is selected the output is inaccurate. We are working to correct this anomaly. Thank you for your patience.

May 24, 2019: EVALIDator users:
EVALIDator's choropleth mapping is currently not working. We are working to resolve the issue, and apologize for the inconvenience.

EVALIDator and DataMart users wishing to know what has recently become available see this page:

September 22, 2015: The EVALIDator is unable to produce estimates of growth, removals and mortality for multiple inventories when "Trend analysis" is chosen as the row classification variable and the inventories chosen have different sampling designs (i.e., a mix of periodic and annual inventories). In the event that a user inadvertently runs such a retrieval the EVALIDator will return zeroes for the periodic inventories and the correct numbers for the annual inventories. We are sorry for any inconvenience.

For more information contact any of the following:

Jim Menlove RMRS ( 801-625-5426

Glenn Christensen PNW ( 503-808-2064

Charles Barnett NRS ( 603-868-7620

Carol Perry SRS ( 828-257-4236

Welcome to our site

We are the Nation's Forest Census

The Forest Inventory and Analysis (FIA) Program of the U.S. Forest Service provides the information needed to assess America's forests.

As the Nation's continuous forest census, our program projects how forests are likely to appear 10 to 50 years from now. This enables us to evaluate whether current forest management practices are sustainable in the long run and to assess whether current policies will allow the next generation to enjoy America's forests as we do today.

FIA reports on  status and trends in forest area and location; in the species, size, and health of trees; in total tree growth, mortality, and removals by harvest;  in wood production and utilization rates by various products; and in forest land ownership.

The Forest Service has significantly enhanced the FIA program by changing from a periodic survey to an annual survey, by increasing our capacity to analyze and publish data, and by expanding the scope of our data collection to include soil, under story vegetation, tree crown conditions, coarse woody debris, and lichen community composition on a subsample of our plots. The FIA program has also expanded to include the sampling of urban trees on all land use types in select cities.

FIA is managed by the Research and Development organization within the USDA Forest Service in cooperation with State and Private Forestry and National Forest Systems. FIA traces its origin back to the McSweeney - McNary Forest Research Act of 1928 (P.L. 70-466). This law initiated the first inventories starting in 1930.

FIA Users Manual for Phase 2

FIADB User Guides


USDA Forest Service
Last Modified: December 18, 2019

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