Polk County is a county located in the U.S. state of Arkansas. As of the most recent data available, the county has a population of approximately 20,229 people, with a population density of about 23.52 persons per square mile.
The county spans a total land area of 860.00 square miles (2,227.00 square kilometers). The administrative center and county seat is Mena, which often serves as a hub for local governance and services. The largest city within the county by population is Mena.
Geographically, Polk County experiences varied elevations, with its highest point at Mena 1,169 ft and its lowest point at Grannis 936 ft. The region operates in the UTC-6.