The map below shows the unduplicated Medicaid enrollment (as a percentage of total population) by county for state fiscal year 2011. The overall enrollment rate for Oklahoma was 25.6%. Rural enrollment was 28.2% (see map of rural Oklahoma). Adair County had the highest enrollment at 43.9% and Osage County had the lowest at 15.1%. Regionally, southeast Oklahoma had the highest enrollment at 32.3%. The lowest regional enrollment was in northwest Oklahoma, including the Panhandle, at 21.3%. Northeast Oklahoma had an enrollment of 25.7% and the southwest region was at 24.7%.