Whitstran is a small, unincorporated community in Benton County, Washington, located approximately four miles Northeast of Prosser and approximately ten miles west of Benton City. The focal point of the community is at the intersection of North Rothrock Road and Foisy Road, where there is a small grocery store, and nearby Whitstran Elementa…Whitstran is a small, unincorporated community in Benton County, Washington, located approximately four miles Northeast of Prosser and approximately ten miles west of Benton City. The focal point of the community is at the intersection of North Rothrock Road and Foisy Road, where there is a small grocery store, and nearby Whitstran Elementary School.