Major highways

• Interstate 80
• U.S. Highway 30
• U.S. Highway 287

Adjacent counties

National protected areas and State historical sites

• Fort Fred Steele State Historic Site^[9]
• Medicine Bow National Forest (part)
• Pathfinder National Wildlife Refuge (part)

Census-designated places

• Arlington
• Ryan Park

2000 census

As of the 2000 United States Census,^[13] there were 15,639 people, 6,129 households, and 4,130 families in the county. The population density was 2 people per square mile (0.77 people/km²). There were 8,307 housing units at an average density of 1 units per square mile (0.39 units/km²). The racial makeup of the county was 90.11% White, 0.67% African-American or Black, 1.27% Indigenous American, 0.67% Asian, 0.06% Pacific Islander, 5.17% from other races, and 2.05% from two or more races. 13.83% of the population were Hispanic or Latino of any race. 20.1% were of German, 11.8% English, 10.0% Irish and 8.9% American ancestry.

There were 6,129 households, out of which 31.20% had children under the age of 18 living with them, 55.10% were married couples living together, 8.30% had a female householder with no husband present, and 32.60% were non-families. Of 6,129 households, 364 were unmarried partner households: 318 heterosexual, 41 same-sex male, and 5 same-sex female.

27.50% of all households were made up of individuals, and 9.60% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.91.

The county population contained 24.10% under the age of 18, 8.60% from 18 to 24, 28.40% from 25 to 44, 26.70% from 45 to 64, and 12.30% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 115.30 males. For every 100 females age 18 and over, there were 118.10 males.

The median income for a household in the county was $36,060, and the median income for a family was $41,991. Males had a median income of $31,603 versus $21,451 for females. The per capita income for the county was $18,375. About 9.80% of families and 12.90% of the population were below the poverty line, including 16.60% of those under age 18 and 14.80% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 15,885 people, 6,388 households, and 4,109 families in the county.^[14] The population density was 2.0 people per square mile (0.77 people/km²). There were 8,576 housing units at an average density of 1.1 units per square mile (0.42 units/km²).^[15] The racial makeup of the county was 88.8% white, 1.0% American Indian, 0.7% black or African American, 0.7% Asian, 0.1% Pacific islander, 6.5% from other races, and 2.2% from two or more races. Those of Hispanic or Latino origin made up 16.8% of the population.^[14] In terms of ancestry, 26.0% were German, 15.8% were English, 14.4% were Irish, 5.6% were Scottish, and 4.8% were American.^[16]

Of the 6,388 households, 30.8% had children under the age of 18 living with them, 51.5% were married couples living together, 7.8% had a female householder with no husband present, 35.7% were non-families, and 29.6% of all households were made up of individuals. The average household size was 2.36 and the average family size was 2.91. The median age was 38.9 years.^[14]

The median income for a household in the county was $56,565 and the median income for a family was $65,171. Males had a median income of $51,201 versus $32,603 for females. The per capita income for the county was $26,122. About 5.6% of families and 8.2% of the population were below the poverty line, including 9.6% of those under age 18 and 9.6% of those age 65 or over.^[17]

City

• Rawlins (county seat)

Towns

Unincorporated communities

• Fort Steele