Thursday, April 2, 2026

Question: What California county is the largest in the entire contiguous United States by area?

Answer: San Bernardino County. Covering about 21,105 square miles of Southern California, it is the largest county in the contiguous United States. The county includes 24 incorporated cities and has a population of about 2.2 million. About 82% of the land is vacant, and 13% is used for military purposes.