12,867,878 acres of land.
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San Bernardino County covers approximately 20,105 square miles, which is equivalent to 12,868,912 acres.
The biggest county in the United States is San Bernardino County in California, covering approximately 20,105 square miles.
San Bernardino County in California is the largest county in the contiguous United States by land area.
The five largest counties by land area in the United States are San Bernardino County (California), Coconino County (Arizona), Nye County (Nevada), Elko County (Nevada), and Mohave County (Arizona).
The San Gabriel and San Bernardino Mountains are part of the Transverse Ranges in Southern California.
San Bernardino, California has an elevation of 1,046 feet (319 meters) above sea level.