USDA Forest Service

Forest Inventory and Analysis National Program


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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Program Features



National Assessment - Resources Planning Act (RPA)

The Forest and Rangeland Renewable Resources Planning Act of 1974 RPA, P.L. 93-378, 88 Stat. 475, as amended, directed the Secretary of Agriculture to prepare a Renewable Resources Assessment by December 31, 1975 and update in 1979 and each 10th year thereafter.  FIA currently provides updates of assessment data every five years as required by the Agriculture Research, Extension and Education Reform Act of 1998  (Farm Bill). These assessments include "an analysis of present and anticipated uses, demand for, and supply of the renewable resources, with consideration of the international resource situation, and an emphasis of pertinent supply, demand and price relationships trends."


NEW! Interactive online tool featuring Forest area (acres, percent), number of trees, and growing stock volume by county Nationwide


Forest Resources of the United States, 2017:
A Technical Document Supporting the Forest Service 2020 RPA Assessment
(15 MB)
2017 RPA Resource Tables (1.5 MB)
Forest Resources of the United States, 2012:
A Technical Document Supporting the Update
of the 2010 RPA Assessment
(14 MB)
2012 RPA Resource Tables (2.5 MB)
2012 RPA Board Foot Tables (191 KB)
2007 Forest Resources of the United States
2007 RPA Resource Tables (2 MB)
2007 Board Foot Tables (267 KB)

RPA Maps

Data for the maps were derived from compiled FIA sample observations, except for portions of some western States where National Forest System (NFS) lands were inventoried independently. Data were not available for interior Alaska, the Pacific Basin, Puerto Rico and the U.S. Virgin Islands and a small number of counties in the lower 48 states. Data were downloaded from the 2002 RPA plot summary database in the form of a dbase file. Data are available free at ( Data were joined to the National Atlas of the United States County Boundaries, 2001 shapefile: (, using federal information processing standards (FIPS) county codes.

Each map was derived from a template so that the maps have the same look and feel and that the map components meld into a coherent, consistent graphic design.

Coverage scales, text sizes and line widths for the FIA RPA map template were set primarily with page size (8 1/2 by 11 inch) map products in mind. Coverages were set to scales that would make maximum use of the available space while still allowing sufficient room for titles, legends and other descriptive information. The coterminous United States are in the USA Contiguous Albers Equal Area Conic, USGS version projection using a NAD83 datum. Units are in meters.

The maps allow you to visualize spatially, county level forest resource information from a bird’s eye perspective. To reveal underlying groupings and spatial patterns in the data, categories were first classified using natural breaks using geographic information system (GIS) software.


A complete list of the map descriptions can be found at


2003 National Report on Sustainable Forests is available online

This is a national report on the state of US forests and the indicators of national progress towards the goal of sustainable forest management.  FIA is a major provider of data to this report.


1997 RPA: The United States Forest Resource Current Situation

1992 RPA
English Measurement text and tables:
Metric Measurement Text and Tables:
Forest Cover Map Development:


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USDA Forest Service
Last Modified: May 2, 2019

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