Males had a median income of $28,833 versus $20,075 for females. The per capita income for the county was $17,343. About 5.70% of families and 7.20% of the population were below the poverty line, including 6.30% of those under age 18 and 11.30% of those age 65 or over. As of the 2010 United States Census, there were 8,347 people, 3,452 households, and 2,363 families in the county. The population density was . There were 3,939 housing units at an average density of . The racial makeup of the county was 97.5% white, 0.8% American Indian, 0.2% black or African American, 0.2% Asian, 0.3% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 1.3% of the population. In terms of ancestry, 47.7% were German, 18.4% were Norwegian, 11.3% were Danish, 9.4% were Irish, 8.5% were Dutch, and 2.7% were American. Of the 3,452 households, 29.0% had children under the age of 18 living with them, 58.7% were married couples living together, 5.9% had a female householder with no husband present, 31.5% were non-families, and 27.4% of all households were made up of individuals. The average household size was 2.37 and the average family size was 2.87. The median age was 43.7 years. The median income for a household in the county was $48,068 and the median income for a family was $57,881. Males had a median income of $37,622 versus $27,459 for females. The per capita income for the county was $22,871. About 4.7% of families and 7.7% of the population were below the poverty line, including 8.9% of those under age 18 and 9.1% of those age 65 or over. Turner County hosts the oldest county fair in the Dakotas. It held its first fair on October 13–16, 1880. The Turner County Agriculture Society was organized in March 1880. Its stated purpose was to showcase the agricultural successes of the new county. The fair was held at various locations over the years, but has been at its current location east of Parker for well over half a century.