Pocahontas is a city located in the U.S. state of Arkansas. It is within and the county seat Randolph County along the Black River. It has a total area of 7.55 square miles at 36°15′49″N 90°58′24″W. The elevation is 302 feet above sea level. As of the 2010 census data, it had a total population of 6,608. The population density was 878.58/sq mi. Estimated per capita income in 2015 was $17,650. Recent job growth is negatively decreased by 4.12 percent. The average travel time is 9 minutes. It has Zip code 72455.