Derby is a city located in Sedgwick County, Kansas, in the United States. It functions as a southern suburb of Wichita, situated within the greater metropolitan area of the state's largest city.
According to the 2020 census, Derby had a population of 25,625 residents, making it the largest suburb of Wichita. The city's position as a major suburban center reflects its growth and development as part of the Wichita metropolitan region.