According to theUS Census Bureau, the county has a total area of 4,095 square miles (10,610 km2), of which 4,076 square miles (10,560 km2) is land and 19 square miles (49 km2) (0.5%) is water.[5]
Of the 7,545 households, 30.6% had children under the age of 18; 60.6% were married couples living together; 16.9% had a female householder with no spouse or partner present. 24.0% of households consisted of individuals and 10.7% had someone living alone who was 65 years of age or older.[11] The average household size was 2.7 and the average family size was 3.3.[15] The percent of those with a bachelor's degree or higher was estimated to be 15.5% of the population.[16]
26.2% of the population was under the age of 18, 6.1% from 18 to 24, 22.9% from 25 to 44, 25.8% from 45 to 64, and 19.1% who were 65 years of age or older. The median age was 41.1 years. For every 100 females, there were 96.9 males.[11] For every 100 females ages 18 and older, there were 96.8 males.[11]
The 2016-2020 5-yearAmerican Community Survey estimates show that the median household income was $71,898 (with a margin of error of +/- $4,107). The median family income was $89,792 (+/- $8,048).[17] Males had a median income of $49,994 (+/- $2,287) versus $25,055 (+/- $1,647) for females. The median income for those above 16 years old was $34,877 (+/- $3,801).[18] Approximately, 3.4% of families and 7.2% of the population were below thepoverty line, including 7.4% of those under the age of 18 and 8.4% of those ages 65 or over.[19][20]
As of the2010 United States census, there were 18,106 people, 6,861 households, and 4,957 families in the county.[22] 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).[23] 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.[22] In terms of ancestry, 25.7% wereEnglish, 20.1% wereAmerican, 19.2% wereGerman, 7.5% wereIrish, and 5.0% wereItalian.[24]
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.[22]
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 thepoverty line, including 14.2% of those under age 18 and 6.2% of those age 65 or over.[25]
There were 5,266 households, out of which 36.5% had children under the age of 18 living with them, 66.7% weremarried 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. Theper capita income for the county was $17,533. About 6.4% of families and 9.0% of the population were below thepoverty line, including 11.6% of those under age 18 and 6.4% of those age 65 or over.
