Montgomery, Alabama is 19% larger than Atlanta.
Area: 346 km2 calculated
Atlanta is the capital of and the most populous city in the U.S. state of Georgia, with an estimated 2013 population of 447,841. Atlanta is the cultural and economic center of the Atlanta metropolitan area, home to 5,522,942 people and the ninth largest metropolitan area in the United States. Wikipedia
Area: 411 km2 calculated
Montgomery is the capital of the State of Alabama, and is the county seat of Montgomery County. Named for Richard Montgomery, it is located on the Alabama River, in the Gulf Coastal Plain. As of the 2010 Census, Montgomery had a population of 205,764. Wikipedia