Northern Region (R1) Northeastern Washington, northern Idaho, and Montana; and the national grasslands in North Dakota and northwestern South Dakota
Rocky Mountain Region (R2) Colorado, Wyoming, South Dakota, Nebraska
Southwestern Region (R3) Arizona, New Mexico; and the national grasslands in New Mexico, Oklahoma and the Texas panhandle
Intermountain Region (R4) Utah, western Wyoming, southern Idaho, Nevada and a small portion of California
Pacific Southwest Region (R5) California and Hawaii
Pacific Northwest Region (R6) Washington and Oregon
Southern Region (R8) Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, Oklahoma, Puerto Rico, South Carolina, Tennessee, Texas, and Virginia
Eastern Region (R9) Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, and Wisconsin
