The median age was 37 years. For every 100 females, there were 95.20 males. For every 100 females age 18 and over, there were 90.80 males. The median income for a household in the county was $27,652, and the median income for a family was $33,987. Males had a median income of $29,935 versus $20,861 for females. The per capita income for the county was $14,065. About 14.90% of families and 18.90% of the population were below the poverty line, including 24.90% of those under age 18 and 15.50% of those age 65 or over. Okmulgee County government has three commissioners, one for each of the three Districts. County services, including the District Court, Assessor, County Clerk, Jail, and Sheriff's office, are all located between 6th and 8th St, and Alabama and Seminole Avenues, in the City of Okmulgee. The following sites in Okmulgee County are listed on the National Register of Historic Places: