- Mena is a city located in the Ouachita Mountains in the western part of Arkansas, United States. It is the county seat of Polk County. Mena is known for its scenic beauty with abundant outdoor recreational opportunities, including hiking, fishing, and camping. The city has a population of approximately 5,600 people and offers a small-town atmosphere with a historic downtown area. Mena also serves as a hub for tourists visiting the nearby Queen Wilhelmina State Park and the Talimena National Scenic Byway.