The Riverside-San Bernardino-Ontario area in Southern California posted the highest unemployment rate in July, 11.0 percent, among all large metropolitan areas with populations of 1 million or more, the U.S. Bureau of Labor Statistics reported today. Oklahoma City, Okla., posted the lowest jobless rate at 4.8 percent.

Among metropolitan areas of all sizes, the Yuma, Ariz., area posted the highest jobless rate at 34.5 percent in July. It was followed by El Centro, Calif., with an unemployment rate of 26.1 percent.