Sedgwick County is located in the U.S. state of Kansas. Its county seat is Wichita, the most populous city in the state. As of the 2020 census, the population was 523,824, making it the second-most populous county in Kansas. The county was named for John Sedgwick, the highest ranking Union general killed during the American Civil War.

Wichita is the most populous city in the U.S. state of Kansas and the county seat of Sedgwick County. As of the 2020 census, the population of the city was 397,532. The Wichita metro area had a population of 647,610 in 2020. It is located in south-central Kansas on the Arkansas River.