Marianna is a city located in the U.S. state of Arkansas. It is within and the county seat of Lee County. It has a total land area of 3.61 square miles at 34°46′26″N 90°45′54″W. The elevation is 226 feet above sea level. As of the 2010 census data, it had a total population of 4,115. The population density was 995.85/sq mi. Estimated per capita income in 2015 was $26,265. The average travel time is 20 minutes. It is using Zip code 72360.