Wichita is a city in and the county seat of Sedgwick County, Kansas, United States. The 2008 estimated population of 366,046 made it the 51st largest city in the country and the most populous city in Kansas. Wichita is located in south central Kansas on the Arkansas River. Wichita has evolved into a cultural and entertainment center. The downtown district offers nightclubs, restaurants, shopping centers, museums and parks. Intrust Bank Arena, the arena features 22 suites, 2 party suites, 40 loge boxes and over 300 premium seats with a total potential capacity of over 15,000. arena in the middle of Wichita, opened in January 2010.