Yavapai County located in the center of the U.S. state of Arizona had a population of 167,517 according to the 2000 Census. The county seat is Prescott . According to the U.S. Census Bureau, the county has a total area of 21,051 km² (8,128 mi²). 21,039 km² (8,123 mi²) of it is land and 12 km² (4 mi²) of it is water. The total area is 0.06% water.

As of the census2 of 2000, there were 167,517 people, 70,171 households, and 46,733 families residing in the county. The population density was 8/km² (21/mi²). There were 81,730 housing units at an average density of 4/km² (10/mi²). The racial makeup of the county was 91.89% White, 0.39% Black or African American, 1.60% Native American, 0.51% Asian, 0.08% Pacific Islander, 3.58% from other races, and 1.95% from two or more races. 9.78% of the population were Hispanic or Latino of any race.

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. 11.90% of the population and 7.90% of families were below the poverty line. 15.90% of those under the age of 18 and 6.70% of those 65 and older were living below the poverty line.

Neighboring areas include: Coconino County , Gila County , Maricopa County , La Paz County , and Mohave County .