Sedgwick County (county code: SG) is a county located in the U.S. state of Kansas. As of the 2010 census, the population was 498,365 with a 2018 estimate of 513,607 making it the second-most populous county in Kansas. The county seat is Wichita, the most populous city in the state.
According to the U.S. Census Bureau, the county has a total area of 1,009 square miles (2,610 km), of which 998 square miles (2,580 km) is land and 12 square miles (31 km) (1.2%) is water.
Sedgwick County is part of the Wichita, KS Metropolitan Statistical Area.
As of the census of 2000, there were 452,869 people, 176,444 households, and 117,688 families residing in the county. The population density was 453 people per square mile (175/km²). There were 191,133 housing units at an average density of 191 per square mile (74/km²). The racial makeup of the county was 79.38% White, 9.13% Black or African American, 1.11% Native American, 3.34% Asian, 0.06% Pacific Islander, 4.17% from other races, and 2.81% from two or more races. 8.04% of the population were Hispanic or Latino of any race.
There were 176,444 households out of which 34.40% had children under the age of 18 living with them, 51.70% were married couples living together, 10.90% had a female householder with no husband present, and 33.30% were non-families. 28.20% of all households were made up of individuals and 8.70% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.14.
In the county, the population was spread out with 28.20% under the age of 18, 9.50% from 18 to 24, 30.30% from 25 to 44, 20.60% from 45 to 64, and 11.40% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 97.80 males. For every 100 females age 18 and over, there were 95.20 males.
The median income for a household in the county was $42,485, and the median income for a family was $51,645. Males had a median income of $37,770 versus $26,153 for females. The per capita income for the county was $20,907. About 7.00% of families and 9.50% of the population were below the poverty line, including 11.90% of those under age 18 and 7.00% of those age 65 or over.