The Arkansas River City is a term used to refer to two cities located along the Arkansas River. The first city is Pueblo, Colorado, which is a city located in the south-central part of the state and has a population of over 110, 000 people. The second city is Tulsa, Oklahoma, which is located in the northeastern part of the state and has a population of over 400, 000 people. Both cities are known for their rich cultural heritage and vibrant economies.