Kennesaw is a city in Cobb County, Georgia, United States. It had a population of 29,783 according to the 2010 census. It is part of the Atlanta metropolitan area. Founded in 1887, Kennesaw has a past surrounded with railroad history. During the Civil War, Kennesaw was the staging ground for the Great Locomotive Chase on April 12, 1862. In 2007, the city was selected by Family Circle magazine as one of the nation's "10 best towns for families". The city is perhaps best known nationally for its mandatory gun-possession law.