Korea (South) is 7.5% larger than Indiana (USA).
Area: 99,720 km2 World Factbook
Population: 49,039,986 (July 2014) World Factbook
South Korea, officially the Republic of Korea, is a country in East Asia, constituting the southern part of the Korean Peninsula. The name Korea is derived from Goryeo (also spelt Koryo), a dynasty which ruled in the Middle Ages. Wikipedia
Indiana is a U.S. state located in the midwestern and Great Lakes regions of North America. Indiana is the 38th largest by area and the 16th most populous of the 50 United States. Indiana is the least extensive state in the contiguous United States west of the Appalachian Mountains. Wikipedia