Harvey County (county code HV) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 34,684. Its county seat and most populous city is Newton.
According to the U.S. Census Bureau, the county has a total area of 541 square miles (1,400 km), of which 540 square miles (1,400 km) is land and 1.0 square mile (2.6 km) (0.2%) is water. The Little Arkansas River flows through the county.
Harvey County is part of the Wichita, KS Metropolitan Statistical Area.
As of the 2000 census, there were 32,869 people, 12,581 households, and 8,932 families residing in the county. The population density was 61 people per square mile (24/km²). There were 13,378 housing units at an average density of 25 per square mile (10/km²). The racial makeup of the county was 91.04% White, 1.59% Black or African American, 0.52% Native American, 0.52% Asian, 0.03% Pacific Islander, 4.17% from other races, and 2.14% from two or more races. Hispanic or Latino of any race were 7.97% of the population.
There were 12,581 households out of which 32.80% had children under the age of 18 living with them, 60.20% were married couples living together, 7.70% had a female householder with no husband present, and 29.00% were non-families. 25.80% of all households were made up of individuals and 11.60% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.00.
In the county, the population was spread out with 26.00% under the age of 18, 9.10% from 18 to 24, 26.50% from 25 to 44, 21.60% from 45 to 64, and 16.80% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 94.50 males. For every 100 females age 18 and over, there were 91.60 males.
The median income for a household in the county was $40,907, and the median income for a family was $48,793. Males had a median income of $35,037 versus $22,492 for females. The per capita income for the county was $18,715. About 4.20% of families and 6.40% of the population were below the poverty line, including 7.50% of those under age 18 and 5.00% of those age 65 or over.