Marshall is a city located in the U.S. state of Arkansas. It is within and the county seat of Searcy County. It has a total area of 3.92 square miles at 35°54′36″N 92°38′11″W. The elevation is 1,040 feet above sea level. As of the 2010 census data, it had a total population of 1,355. The population density was 335.55/sq mi. Estimated per capita income in 2015 was $17,861. It is using Zip code 72650.