Kings County, California is 195,305 times larger than Fort Sumter.
Area: 0 km2 calculated
Fort Sumter is a Third System masonry sea fort located in Charleston Harbor, South Carolina. The fort is best known as the site upon which the shots that started the American Civil War were fired, at the Battle of Fort Sumter on April 12, 1861. Wikipedia
Area: 3,605 km2 calculated
Kings County is a county located in the U.S. state of California. It is located in the San Joaquin Valley, a rich agricultural region. The county seat is Hanford. Wikipedia