General · EdgepediaSeptember 17, 20268 min read

South Korea

South Korea, officially the Republic of Korea (대한민국), is a country in East Asia occupying the southern half of the Korean Peninsula, founded in 1948 and bordered by North Korea to the north and Japan to the south across the Korea Strait¹^•²⁵. As of 2023 its population was approximately 51.77 million, making it the 29th most populous country in the world¹. Within a single generation it moved from post-war aid recipient to a high-income, innovation-driven economy, and it completed a transition to democracy in 1987 after four decades of largely autocratic rule²^•³.

Key fact	Detail
Official name	Republic of Korea (대한민국), founded 1948¹
Population	Approximately 51.77 million (2023), 29th most populous country; 51,817,000 in the 2025 census¹^•⁴
Location	Southern Korean Peninsula; bordered by North Korea to the north, Japan to the south across the Korea Strait¹^•²⁵
Government	President elected by direct popular vote for a single, non-renewable five-year term, serving as both head of state and head of government¹
Economic record	GNI per capita rose from $67 in the early 1950s to $36,624 in 2024; real GDP grew an average of 5.6% annually between 1980 and 2024²
Democratization	Completed in 1987; the Sixth Republic was established in 1988⁵^•³
Demographic shift	Entered a super-aged society in 2025, with people aged 65 and over surpassing 20% of the population⁶

Geography and population distribution

The country occupies the southern half of the Korean Peninsula, with North Korea on its northern land border and Japan across the Korea Strait to the south¹^•²⁵. Settlement is heavily concentrated in the northwest: about half of the population lives in the Seoul Metropolitan Area, and approximately 20 percent resides in Seoul itself⁷.

Division, war, and the founding of the Republic

Korea was opened to the imperial powers in the late nineteenth century before it could fully develop the modern elements growing within Joseon society, and subsequent modernization efforts by the government and various social groups did not succeed⁸. After liberation, the partition policy of the United States and the Soviet Union, together with conflict between left- and right-wing forces, left the peninsula divided and prevented the establishment of a unified state⁸.

The Republic of Korea was founded in 1948, and its national anthem was officially adopted that year with the new state¹. The founding established modern democratic administration in law, with the Constitution, the Government Organization Act, and the National Civil Service Act defining the civil service system⁹. On June 25, 1950, war broke out on the peninsula; the National Library of Korea describes this fratricidal war, along with later oil and currency crises, as among the hardships that punctuated the country's drive for growth¹⁰.

Authoritarian rule and economic transformation

Modern South Korean political history from 1948 to 1987 is conventionally divided into four periods: the First Republic; the Second Republic and the Park Chung-hee administration; the Yusin regime; and the period running from the Gwangju Uprising through the Democratization Uprising of 1987⁵. Park Chung-hee took power in a 1961 coup and created the development state beginning in the early 1960s¹¹^•³.

Export-led growth. In the middle of the 1960s the Park government shifted economic policy from import substitution industrialization to export-led development¹². Economic planning began in full swing in the 1960s to pave the way for industrialization, and industrial advances followed in the 1970s, yielding results known as the "Miracle of the Hangang River"¹⁰. A central episode was the heavy and chemical industry (HCI) drive of 1973 to 1979, studied as a key case of industrial policy during the East Asian miracle¹³. The authoritarian period operated with a dual legal structure: instrumental special legislation, such as the Foreign Capital Inducement Act of 1966 and presidential decrees, supported government-led development policy alongside practices that departed from full rule of law¹⁴.

The results were exceptional in scale. Between 1980 and 2024, real GDP grew by an average of 5.6% annually, while gross national income per capita rose from $67 in the early 1950s to $36,624 in 2024². A World Bank assessment notes that a rapid shift toward near-OECD institutional quality occurred between 1980 and 2000, as South Korea moved from middle-income to high-income status and the government brought corruption levels down and improved public administration¹⁵. Scholars have described the country as a distinguished case of achieving industrialization and democratization simultaneously within a short period¹⁶.

Democratization and the Sixth Republic

Democratization was completed in 1987, and the Sixth Republic was established in 1988⁵^•³. The 1987 Constitution established an autonomous judicial system with a Supreme Court and a Constitutional Court and protected judges from direct political pressure, although the prosecution retained significant unchecked authority¹⁷. The 5.18 Democratization Movement in Gwangju, though it failed at the time, became a foundation of the democratization movement from the 1980s onward¹⁸.

Martial law was first used in 1948 by President Syngman Rhee and invoked repeatedly through the authoritarian decades that followed³. Amid the Asian financial crisis of 1997–98, the World Bank extended $7 billion in adjustment lending aimed at backing reforms of the financial sector, corporate governance, labor markets, and social safety nets.²

From aid recipient to donor

Korea joined the International Bank for Reconstruction and Development in 1955 and the International Development Association in 1961; World Bank operations began in 1962 with a $17 million IDA credit to expand the Korean National Railroad, and by 1973 Korea no longer required IDA support². In total the World Bank completed 120 credit or loan projects in Korea, disbursing $15 billion². Korea has contributed to the International Development Association since 1977, and in 2010 it became the first former aid recipient to join the OECD Development Assistance Committee².

The December 2024 martial law crisis and its aftermath

In December 2024, President Yoon Suk Yeol declared martial law, the first such measure by a South Korean government since democratization; lawmakers thwarted the attempt, and Yoon was removed from office over the imposition³^•¹⁹. A snap election in June 2025 brought the liberal leader Lee Jae-myung to the presidency; he took office immediately without a transition period, describing his victory as the start of a return to normalcy²⁰. Lee identified the economy as his top priority, vowing an emergency task force against recession, and pledged to restart dormant talks with North Korea while bolstering the trilateral partnership with the United States and Japan²¹.

The economy he inherited was under strain. The central bank had cut its key interest rate and lowered its 2025 growth forecast to 0.8%, which would have been the weakest performance since the 0.7% contraction of the COVID-19 crisis year 2020²². The Korea Development Institute subsequently projected growth of around 2.5% for 2026, supported by robust semiconductor exports and a recovery in domestic demand, easing to about 1.7% in 2027²³.

Demographics and society

The population has plateaued at around 51 million for more than a decade: the 2025 census recorded 51,817,000 people, the 11th consecutive year at the 51 million mark, with a rising influx of foreign residents offsetting a fall in the number of citizens, which stood at 49,708,000 and has declined every year since 2021⁴. In 2025 South Korea entered a super-aged society, with the population aged 65 and over surpassing 20%, while the working-age population aged 15 to 64 fell to 35.87 million, or 69.2%, below 70% for the first time since comparable statistics began in 2015⁶.

In religious terms, South Korea is, relative to its population, the most Christianized country in Asia after the Philippines, with the highest number of evangelical believers²⁴. Interpretations of national history since independence in 1945 remain at the center of the divide between right and left, with conservative movements stressing the role of Japanese colonialism in modernization and seeking to rehabilitate the authoritarian leaders Syngman Rhee (1948-1960), Park Chung-hee (1961-1979), and Chun Doo-hwan (1980-1988)²⁴.

References

Initially written Sep 17, 2026 · Reviewed: Sep 18, 2026; Sep 30, 2026; Oct 21, 2026 · Edited: Sep 18, 2026; Sep 30, 2026; Oct 21, 2026; Oct 25, 2026