The springs are still there and are maintained by a local church. After the late 19th century lynchings in the county, and the state's disenfranchisement of blacks at the end of the century, many African Americans left in the Great Migration, as may be seen in population decreases at the beginning of the 20th century. As of the census of 2010, there were 63,505 people and 24,877 households residing in the county. The population density was 93.1 people per square mile (36 per km2). There were 28,753 housing units at an average density of 39 per square mile (18 per km2). The racial makeup of the county was 76.0% White, 13.2% Black or African American, 0.5% Native American, 1.1% Asian, 0.0% Pacific Islander, 7.1% from other races, and 1.9% from two or more races. 13.0% of the population were Hispanic or Latino of any race. The median income for a household in the county was $56,038. The per capita income for the county was $29,991. About 12.2% of the population were below the poverty line. In 2000, there were 19,741 households out of which 28.80% had children under the age of 18 living with them, 56.30% were married couples living together, 10.00% had a female householder with no husband present, and 29.80% were non-families. 24.50% of all households were made up of individuals and 10.00% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 2.91. In 2000, the age distribution of the county was 22.50% under the age of 18, 7.30% from 18 to 24, 30.40% from 25 to 44, 24.60% from 45 to 64, and 15.30% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 96.80 males. For every 100 females age 18 and over, there were 93.80 males. The county has the highest average lifespan in the United States—97.5 years—according to data provided by the National Center for Health Statistics. A five-member Board of Commissioners governs Chatham County. The commissioners are elected at large, but must reside within a particular district.