Preliminary statistics from the California Department of Employment Development Labor Market Information Division shows overall unemployment in Contra Costa County was 9.4% in July 2012. July unemployment nationally was 8.3% per the Bureau of Labor Statistics. Knisghtsen (19.6) and Crockett (18.5%) had the highest unemployment rates. Port Costa (0%), Waldon (2.6%), and Kensignton (3.4%) had the lowest unemployed rate. See table below with full details.