Marianna is a city in Jackson County, Florida, United States. The population was 6,230 at the 2000 census. As of 2004, the population estimated by the U.S. Census Bureau is 6,200 . It is the county seat of Jackson County and is home to Chipola College. The official nickname of Marianna is "The City of Southern Charm."
Marianna is located at 30°46′35″N 85°14′17″W / 30.77639°N 85.23806°W / 30.77639; -85.23806 (30.776370, -85.238149).
According to the United States Census Bureau, the town has a total area of 8.1 square miles (20.9 km²). 8.0 square miles (20.8 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.37%) is water.