Capital: Seoul 2nd City: Incheon 3rd City: Suwon Population: 25 million GDP: $1.09 trillion GDP per capita: $43,600 Area: 11,800km² Currency: Won (₩) Because power is so heavily concentrated in the capital, Seoul, it is often called the 'Republic of Seoul.' Consequently, the fall of Seoul would be fatal.

Capital: Wonju 2nd City: Chuncheon 3rd City: Gangneung Population: 1.5 million GDP: $44 billion GDP per capita: $29,300 Area: 16,800km² Currency: Won (₩) While the capital, Wonju, has seen significant development, an increasing number of people feel anxious due to the nation's proximity to the Gyeonggi Republic following the split.

Capital: Daejeon 2nd City: Sejong 3rd City: Cheonan Population: 4 million GDP: $143 billion GDP per capita: $35,750 Area: 9,200km² Currency: Won (₩) Although Cheonan is more dominant than Sejong, Sejong is designated as the second city because it serves as the Administrative Complex City.

Capital: Cheongju 2nd City: Chungju 3rd City: Jecheon Population: 1.6 million GDP: $73 billion GDP per capita: $45,630 Area: 7,400km² Currency: Won (₩) While not to the extent of Gyeonggi, power is concentrated in the capital, Cheongju. Efforts are being made to develop Chungju and Jecheon to prevent over-centralization.

Capital: Busan 2nd City: Ulsan 3rd City: Changwon Population: 7.4 million GDP: $185 billion GDP per capita: $24,670 Area: 10,000km² Currency: Won (₩) Although the national GDP per capita appears low, Ulsan's individual GRDP is $77,500, which is higher than Seoul's ($51,600).

Capital: Daegu 2nd City: Pohang 3rd City: Gumi Population: 4.8 million GDP: $132 billion GDP per capita: $27,500 Area: 19,000km² Currency: Won (₩) The southern region of the Gyeongbuk Republic is characterized by higher summer temperatures than other parts of the peninsula. There are ongoing discussions about moving the capital to Pohang for trade, economy, and transportation reasons.

Capital: Gwangju 2nd City: Yeosu 3rd City: Suncheon Population: 3.2 million GDP: $93 billion GDP per capita: $29,000 Area: 12,500km² Currency: Won (₩) The Jeonnam Republic possesses over 2,000 islands. Its industry is focused on shipping and fisheries. It is also known for having a very long coastline.

Capital: Jeonju 2nd City: Iksan 3rd City: Gunsan Population: 1.7 million GDP: $51 billion GDP per capita: $30,000 Area: 8,000km² Currency: Won (₩) The Jeonbuk Republic produces a large amount of rice, centered around Gimje and Iksan. Recently, as Jeonju has been declining, there have been calls to designate Iksan or Gunsan as the new capital.

Capital: Jeju 2nd City: Seogwipo 3rd City: (None) Population: 660,000 GDP: $19 billion GDP per capita: $28,800 Area: 1,850km² Currency: Won (₩) The Jeju Republic feels increasingly like a tropical region as time passes. The tourism industry plays a vital role in the economy, and the fishing industry forms the core of the national economy.