South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its eastern border is defined by the Sea of Japan. About 25 million people, around half of the country's population of 51 million, live in the Seoul Capital Area.

The South Korean government's structure is determined by the Constitution of the Republic of Korea. Like many democratic states,South Korea has a government divided into three branches: executive, judicial, and legislative. The executive and legislative branches operate primarily at the national level, although various ministries in the executive branch also carry out local functions. Local governments are semi-autonomous, and contain executive and legislative bodies of their own. The judicial branch operates at both the national and local levels. South Korea is a constitutional democracy.

The National Assembly of South Korea

The constitution has been revised several times since its first promulgation in 1948 at independence. However, it has retained many broad characteristics and with the exception of the short-lived Second Republic of South Korea, the country has always had a presidential system with an independent chief executive.Under its current constitution the state is sometimes referred to as the Sixth Republic of South Korea. The first direct election was also held in 1948.

20th President Yoon Seok-youl