Hartley County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 6,062. The county seat is Channing. The county was created in 1876 and later organized in 1891. It is named for Oliver C. Hartley and his brother, Rufus K. Hartley, two early Texas legislators and lawyers.
According to the U.S. Census Bureau, the county has a total area of 1,463 square miles (3,790 km), of which 1,462 square miles (3,790 km) is land and 1.2 square miles (3.1 km) (0.08%) is water.
As of the census of 2000, there were 5,537 people, 1,604 households, and 1,220 families residing in the county. The population density was 4 people per square mile (1/km²). There were 1,760 housing units at an average density of 1 per square mile (0/km²). The racial makeup of the county was 81.07% White, 8.15% Black or African American, 0.43% Native American, 0.27% Asian, 0.05% Pacific Islander, 8.60% from other races, and 1.43% from two or more races. 13.69% of the population were Hispanic or Latino of any race. In terms of ancestry, 21.0% were of German, 12.6% were of English, 12.3% were of Irish, 6.6% were of American, 4.3% were of French, 3.0% were of Scottish, 3.0% were of Dutch.
There were 1,604 households out of which 35.50% had children under the age of 18 living with them, 68.90% were married couples living together, 4.70% had a female householder with no husband present, and 23.90% were non-families. 21.60% of all households were made up of individuals and 11.80% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 2.98.
In the county, the population was spread out with 20.80% under the age of 18, 4.70% from 18 to 24, 35.70% from 25 to 44, 26.90% from 45 to 64, and 11.90% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 154.10 males. For every 100 females age 18 and over, there were 172.90 males.
The median income for a household in the county was $46,327, and the median income for a family was $53,004. Males had a median income of $29,783 versus $21,783 for females. The per capita income for the county was $18,067. About 3.70% of families and 6.60% of the population were below the poverty line, including 8.00% of those under age 18 and 5.30% of those age 65 or over.