Old gold specimen from an unknown Yavapai County mine. Size: 2.0 cm × 1.8 cm × 1.7 cm (0.8 in × 0.7 in × 0.7 in).
Yavapai County was one of the four original Arizona counties created by the 1st Arizona Territorial Legislature. The county territory was defined as being east of longitude 113° 20' and north of the Gila River. Soon thereafter, the counties of Apache, Coconino, Maricopa, and Navajo were carved from the original Yavapai County. Yavapai County's present boundaries were established in 1891.
The county is named after the Yavapai people, who were the principal inhabitants at the time the United States annexed the area.
According to the U.S. Census Bureau, the county has a total area of 8,128 square miles (21,050 km2), of which 8,123 square miles (21,040 km2) is land and 4.4 square miles (11 km2) (0.05%) is water. It has about 93% of the area of the U.S. state of New Jersey. It is larger than three U.S. states (Rhode Island, Delaware and Connecticut) and the District of Columbia combined.
The county's topography makes a dramatic transition from the lower Sonoran Desert to the south to the heights of the Coconino Plateau to the north, and the Mogollon Rim to the east. The highest point above sea level (MSL) in Yavapai County is Mount Union at an elevation of 7,979 ft (2,432 m) and the lowest is Agua Fria River drainage, now under Lake Pleasant.
Out of Africa Wildlife Park is a private zoo. The park moved to the Camp Verde area from the East Valley in 2005.
Approximately 10 miles (16 km) northwest of the town of Bagdad lies the Upper Burro Creek Wilderness Area, a 27,440-acre (11,105 ha) protected area home to at least 150 species of birds and featuring one of the Arizona desert's few undammed perennial streams.
There were 70,171 households out of which 23.80% had children under the age of 18 living with them, 55.00% were married couples living together, 8.10% had a female householder with no husband present, and 33.40% were non-families. 26.70% of all households were made up of individuals and 12.40% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.79.
In the county, the population was spread out with 21.10% under the age of 18, 7.10% from 18 to 24, 22.40% from 25 to 44, 27.40% from 45 to 64, and 22.00% who were 65 years of age or older. The median age was 44 years. For every 100 females there were 96.20 males. For every 100 females age 18 and over, there were 93.50 males.
The median income for a household in the county was $34,901, and the median income for a family was $40,910. Males had a median income of $30,738 versus $22,114 for females. The per capita income for the county was $19,727. About 7.90% of families and 11.90% of the population were below the poverty line, including 15.90% of those under age 18 and 6.70% of those age 65 or over.
By 2017 Census Bureau Estimates placed the population of Yavapai County at 228,168. This represented a 24.2% growth in the population since 2000.
As of the 2010 census, there were 211,033 people, 90,903 households, and 57,597 families living in the county. The population density was 26.0 inhabitants per square mile (10.0/km2). There were 110,432 housing units at an average density of 13.6 per square mile (5.3/km2). The racial makeup of the county was 89.3% white, 1.7% American Indian, 0.8% Asian, 0.6% black or African American, 0.1% Pacific islander, 4.9% from other races, and 2.5% from two or more races. Those of Hispanic or Latino origin made up 13.6% of the population. The largest ancestry groups were:
Of the 90,903 households, 22.8% had children under the age of 18 living with them, 50.3% were married couples living together, 9.0% had a female householder with no husband present, 36.6% were non-families, and 29.1% of all households were made up of individuals. The average household size was 2.28 and the average family size was 2.78. The median age was 49.2 years.
The median income for a household in the county was $43,290 and the median income for a family was $53,499. Males had a median income of $40,854 versus $31,705 for females. The per capita income for the county was $25,527. About 8.8% of families and 13.7% of the population were below the poverty line, including 20.1% of those under age 18 and 6.1% of those age 65 or over.
Yavapai has historically been the most Republican county in Arizona, though it has become rivalled by Graham and exceeded by Mohave since the turn of the century. No Democratic presidential nominee has won Yavapai County since Harry S. Truman in 1948, and even when the county did go Democratic in the Truman and Roosevelt eras it typically did so by a smaller margin than any other county in the state.
Presidential election results
Yavapai County vote by party in presidential elections
Fuis, G. S. (1996). The geology and mechanics of formation of the Fort Rock dome, Yavapai County, Arizona [U.S. Geological Survey Professional Paper 1266]. Washington, D.C.: U.S. Geological Survey, U.S. Department of the Interior.