Miller 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 40,443 people, with a population density of about 64.81 persons per square mile.
The county spans a total land area of 624.00 square miles (1,616.00 square kilometers). The administrative center and county seat is Texarkana, which often serves as a hub for local governance and services. The largest city within the county by population is Texarkana.
Geographically, Miller County experiences varied elevations, with its highest point at Texarkana 360 ft and its lowest point at Garland 228 ft. The region operates in the UTC-6.