Major highways

• Interstate 79
• U.S. Highway 33
• U.S. Highway 119
• West Virginia Route 14
• West Virginia Route 36

Adjacent counties

• Wirt County (north)
• Calhoun County (east)
• Clay County (southeast)
• Kanawha County (south)
• Jackson County (west)

2000 census

As of the census of 2000, there were 15,446 people, 6,161 households, and 4,479 families living in the county. The population density was 32 people per square mile (12 people/km²). There were 7,360 housing units at an average density of 15 per square mile (5.8/km²). The racial makeup of the county was 98.56% White, 0.22% Black or African American, 0.21% Native American, 0.23% Asian, 0.19% from other races, and 0.60% from two or more races. 0.67% of the population were Hispanic or Latino of any race.

There were 6,161 households, out of which 30.70% had children under the age of 18 living with them, 59.10% were married couples living together, 9.30% had a female householder with no husband present, and 27.30% were non-families. 23.50% of all households were made up of individuals, and 11.90% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.91.

In the county, the population was spread out, with 23.40% under the age of 18, 8.70% from 18 to 24, 26.60% from 25 to 44, 26.50% from 45 to 64, and 14.80% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 98.00 males. For every 100 females age 18 and over, there were 96.00 males.

The median income for a household in the county was $24,511, and the median income for a family was $29,280. Males had a median income of $28,738 versus $17,207 for females. The per capita income for the county was $13,195. About 17.80% of families and 22.60% of the population were below the poverty line, including 32.10% of those under age 18 and 15.50% of those age 65 or over.

2010 census

As of the 2010 United States census, there were 14,926 people, 6,195 households, and 4,193 families living in the county.^[12] The population density was 30.9 inhabitants per square mile (11.9/km²). There were 7,351 housing units at an average density of 15.2 per square mile (5.9/km²).^[13] The racial makeup of the county was 98.4% white, 0.3% Asian, 0.2% American Indian, 0.1% black or African American, 0.2% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 0.7% of the population.^[12] In terms of ancestry, 20.7% were American, 17.9% were Irish, 15.3% were German, and 9.1% were English.^[14]

Of the 6,195 households, 28.9% had children under the age of 18 living with them, 53.2% were married couples living together, 9.9% had a female householder with no husband present, 32.3% were non-families, and 27.2% of all households were made up of individuals. The average household size was 2.39 and the average family size was 2.89. The median age was 43.5 years.^[12]

The median income for a household in the county was $27,428 and the median income for a family was $35,289. Males had a median income of $32,106 versus $22,914 for females. The per capita income for the county was $15,103. About 21.5% of families and 27.6% of the population were below the poverty line, including 41.5% of those under age 18 and 15.5% of those age 65 or over.^[15]

City

• Spencer (county seat)

Town

• Reedy

Magisterial districts

Unincorporated communities