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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Volume of Growing-Stock Trees per Acre of Timberland, 2007


This map shows the spatial distribution of the nation’s volume of growing stock
trees in 2007 as a percentage of county timberland area. Nationwide, on average
by county, growing stock volume averages 1,329 cubic feet per acre of timberland.

Use this map only to identify broad spatial trends. At the time of assessment, data were not available for interior Alaska, the Pacific Basin, Puerto Rico, U.S. Virgin Islands, and a small number of counties in the lower 48 states.



USDA Forest Service, 2007 RPA data, available at:


USDA Forest Service, Forest Inventory and Analysis.


USDA Forest Service, 2007 RPA data and the National Atlas of the United States.


Growing Stock is defined as a classification of timber inventory that includes live trees of commercial species meeting specified standards of quality or vigor. Cull trees are excluded. When associated with volume, includes only trees 5.0 inches in diameter at breast height (dbh) (4.5 feet) and larger. Timberland is defined as forest land capable of producing crops of industrial wood (20 cubic feet per acre per year in natural stands) that is not withdrawn from timber utilization by statute or administrative regulation.


Map 508 kb PDF

High resolution zipped
files for download:
Map 1253 kb- PDF
Map 2,893 kb - JPG

USDA Forest Service
Last Modified: March 31, 2009

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