Flag

Johnson County flag is based on the ikurriña; since the birth of Jean Esponda from Baigorri, there has been a large Basque population in the county.^[5]

Adjacent counties

Major highways

Transit

• Express Arrow
• Jefferson Lines

National protected area

• Bighorn National Forest (part)

2000 census

At the 2000 United States Census,^[10] there were 7,075 people, 2,959 households and 2,006 families in the county. The population density was 2 people per square mile (0.77 people/km²). There were 3,503 housing units at an average density of 0.8 units per square mile (0.31 units/km²). The racial makeup of the county was 97.03% White, 0.08% Black or African American, 0.64% Native American, 0.11% Asian, 0.55% from other races, and 1.58% from two or more races. 2.09% of the population were Hispanic or Latino of any race. 27.0% were of German, 15.2% English, 10.8% Irish and 7.9% American ancestry.

There were 2,959 households, of which 28.70% had children under the age of 18 living with them, 57.00% were married couples living together, 7.10% had a female householder with no husband present, and 32.20% were non-families. 28.50% of all households were made up of individuals, and 12.00% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.89.

24.20% of the population were under the age of 18, 5.60% from 18 to 24, 23.50% from 25 to 44, 28.70% from 45 to 64, and 18.00% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 96.60 males. For every 100 females age 18 and over, there were 94.30 males.

The median household income was $34,012 and the median family income was $42,299. Males had a median income of $29,271 and females $20,469. The per capita income was $19,030. About 7.20% of families and 10.10% of the population were below the poverty line, including 9.10% of those under age 18 and 10.60% of those age 65 or over.

2010 census

At the 2010 United States Census, there were 8,569 people, 3,782 households, and 2,410 families in the county.^[11] The population density was 2.1 people per square mile (0.81 people/km²). There were 4,553 housing units at an average density of 1.1 units per square mile (0.42 units/km²).^[12] The racial makeup was 96.5% white, 1.1% American Indian, 0.4% Asian, 0.2% black or African American, 0.7% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 3.2% of the population.^[11] In terms of ancestry, 31.6% were German, 22.4% were Irish, 18.3% were English, and 6.1% were American.^[13]

Of the 3,782 households, 26.1% had children under the age of 18 living with them, 53.5% were married couples living together, 6.7% had a female householder with no husband present, 36.3% were non-families, and 31.8% of all households were made up of individuals. The average household size was 2.25 and the average family size was 2.83. The median age was 44.8 years.^[11]

The median household income was $45,638 and the median family income was $58,983. Males had a median income of $40,572 and females $30,352. The per capita income was $26,753. About 5.9% of families and 8.2% of the population were below the poverty line, including 8.0% of those under age 18 and 7.3% of those age 65 or over.^[14]

City

• Buffalo (county seat)

Town

• Kaycee

Unincorporated communities

• Hazelton^[15]
• Linch
• Saddlestring
• Sussex^[16]