Atlantic is a city in and the county seat of Cass County, Iowa, United States, located along the East Nishnabotna River. The population was 6,792 in the 2020 census, a decline from the 7,257 population in 2000. History Atlantic was founded in October 1868 by Franklin H. Whitney, B.F. Allen, John P. Cook, and others. While historians cannot agree on how Atlantic got its name, local legend tells that the founding fathers estimated that the town was about halfway between the Pacific Ocean and the Atlantic Ocean, so it led them to flip a coin and, clearly, Atlantic won. The nearby Rock Island Railroad was important in deciding the actual location of the town, and to this day, the old depot sits at the north end of Chestnut Street. Today, the depot serves as the offices of the Chamber of Commerce. A log cabin stands in Atlantic City Park with a historical plaque bearing the following inscription: Another story told about Atlantic is the way the main street was located. Someone asked Whitney where it should be placed. He marked the center at current day 6th and Chestnut and then plowed two furrows apart all the way up to the railroad, just north of Second Street. Since 1929, Atlantic is noted for the Atlantic Coca-Cola Bottling Company, which bottles and distributes drinks from The Coca-Cola Company to Iowa and parts of Minnesota, Wisconsin, Illinois, and Missouri. Atlantic has one high school, The Atlantic High School, home of the Atlantic Trojans. Geography Atlantic's longitude and latitude coordinates in decimal form are 41.401404, -95.010867. According to the United States Census Bureau, the city has a total area of , of which is land and is water. Climate According to the Köppen Climate Classification system, Atlantic has a hot-summer humid continental climate, abbreviated "Dfa" on climate maps. Demographics 2010 census At the 2010 census there were 7,112 people, 3,137 households, and 1,906 families living in the city. The population density was . There were 3,399 housing units at an average density of . The racial makup of the city was 97.0% White, 0.2% African American, 0.3% Native American, 0.3% Asian, 0.5% Pacific Islander, 1.0% from other races, and 0.6% from two or more races. Hispanic or Latino of any race were 2.6%. Of the 3,137 households, 26.8% had children under the age of 18 living with them, 47.0% were married couples living together,