Arkansas City is a city in Cowley County, Kansas, United States, situated at the confluence of the Arkansas and Walnut rivers in the southwestern part of the county. As of the 2010 census, the city population was 12,415.The name of this city is not pronounced like the nearby state of Arkansas, but rather as /ɑːrˈkænzəs/. Over the years there has been much confusion about the regional pronunciation of "Arkansas", which locals render as /ɑːrˈkænzəs/ rather than /ˈɑːrkənsɔː/. Throughout much of Kansas, residents use this alternative pronunciation when referring to the Arkansas River, as well as Arkansas Street in the city of Wichita. Because of this, and for the sake of brevity, Arkansas City is most often referred to as simply Ark City.