Skip to main content
Soil scientist examining soil.

Soil Classification

A common language for sharing scientific knowledge and interpreting soil survey information.

Sign up for email updates on Soil Classification

Additional Information

World Reference Base

The World Reference Base (WRB) is the international standard for soil classification system endorsed by the International Union of Soil Sciences.

Learn More

Contact Soils

Please contact us if you see something that needs to be updated, if you have any questions, or if you need accessibility assistance.

Find Your Local Service Center

USDA Service Centers are locations where you can connect with Farm Service Agency, Natural Resources Conservation Service, or Rural Development employees for your business needs. Enter your state and county below to find your local service center and agency offices. If this locator does not work in your browser, please visit offices.usda.gov.