Adjacent counties

National protected areas

2000 census

As of the 2000 United States Census,^[10] there were 14,573 people, 5,266 households, and 3,949 families in the county. The population density was 4 people per square mile (1.5 people/km²). There were 6,831 housing units at an average density of 2 units per square mile (0.77 units/km²). The racial makeup of the county was 97.15% White, 0.10% Black or African American, 0.57% Native American, 0.23% Asian, 0.05% Pacific Islander, 0.71% from other races, and 1.19% from two or more races. 2.16% of the population were Hispanic or Latino of any race. 29.0% were of English, 14.6% German, 9.5% American and 6.1% Irish ancestry.

There were 5,266 households, out of which 36.5% had children under the age of 18 living with them, 66.7% were married couples living together, 5.1% had a female householder with no husband present, and 25.0% were non-families. 21.0% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.23.

The county population contained 30.9% under the age of 18, 7.2% from 18 to 24, 25.4% from 25 to 44, 24.2% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 102.0 males. For every 100 females age 18 and over, there were 101.3 males.

The median income for a household in the county was $40,794, and the median income for a family was $44,919. Males had a median income of $37,353 versus $20,928 for females. The per capita income for the county was $17,533. About 6.4% of families and 9.0% of the population were below the poverty line, including 11.6% of those under age 18 and 6.4% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 18,106 people, 6,861 households, and 4,957 families in the county.^[11] The population density was 4.4 people per square mile (1.7 people/km²). There were 8,946 housing units at an average density of 2.2 units per square mile (0.85 units/km²).^[12] The racial makeup of the county was 95.4% white, 0.8% American Indian, 0.3% Asian, 0.2% black or African American, 2.0% from other races, and 1.2% from two or more races. Those of Hispanic or Latino origin made up 4.3% of the population.^[11] In terms of ancestry, 25.7% were English, 20.1% were American, 19.2% were German, 7.5% were Irish, and 5.0% were Italian.^[13]

Of the 6,861 households, 34.4% had children under the age of 18 living with them, 63.2% were married couples living together, 5.3% had a female householder with no husband present, 27.8% were non-families, and 22.8% of all households were made up of individuals. The average household size was 2.63 and the average family size was 3.11. The median age was 37.4 years.^[11]

The median income for a household in the county was $57,794 and the median income for a family was $65,347. Males had a median income of $49,087 versus $30,539 for females. The per capita income for the county was $24,421. About 4.6% of families and 8.1% of the population were below the poverty line, including 14.2% of those under age 18 and 6.2% of those age 65 or over.^[14]

2014 American Community Survey

According to the 2014 American Community Survey, the largest ancestries/ethnicities in Lincoln County, Wyoming were:

• 27.3% were of English ancestry
• 17.9% were of German ancestry
• 10.6% were of "American" ancestry
• 7.5% were of Irish ancestry
• 4.2% were of Italian ancestry.^[15]

City

• Kemmerer (county seat)

Towns

Census-designated places

Unincorporated communities