South Korea Population 2026 | Live Population Clock By Region
South Korea Population 2026: A Country Facing the World’s Lowest Fertility Rate
When a sitting South Korean president declares a national demographic emergency, when government agencies publish countdowns to projected national extinction scenarios, and when serious policy debates include proposals to incentivize multiple childbirth through housing allocations and tax credits, the demographic story has moved beyond academic discussion. South Korea in 2026 has the lowest total fertility rate of any country in the world at approximately 0.75 children per woman, the largest sustained fertility decline recorded in any peacetime developed country, and a demographic trajectory that few other countries have approached.
The South Korean population in 2026 stands at approximately 51.5 million according to the live counters on worldpopulationclock.net, drawing on the United Nations World Population Prospects 2024 revision and the most recent estimates from Statistics Korea. The country peaked at approximately 51.83 million in 2020 and has been declining gradually since. Annual births have fallen below 240,000 in 2024, less than one quarter of the 1971 peak when more than one million Korean babies were born in a single year.
This piece examines the South Korean population as a case study of the fertility crisis that has arrived earlier and more sharply in Korea than perhaps anywhere else, the regional distribution within the country, the policy responses tried and their limited success, and the projected trajectory that could see the population fall by more than half within the coming century.
How Korean Fertility Collapsed from Six to Under One in Sixty Years
Korean total fertility stood at approximately 6.0 children per woman in the early 1960s. The transition to below replacement fertility took place over roughly twenty-five years, with the rate falling below 2.1 by 1983. Subsequent decades saw continued decline:
- 1960: 6.0 children per woman
- 1983: 2.06 (fell below replacement)
- 2000: 1.48
- 2010: 1.23
- 2018: 0.98 (fell below 1.0 for the first time)
- 2022: 0.78
- 2024: 0.72 (lowest figure recorded)
- 2026: 0.75 (slight stabilization)
The compression of the fertility transition has been remarkable even by East Asian standards. South Korea moved from fertility above 6 to below 1 in approximately six decades, a transition that took most European countries more than a century. The continued decline below 1.0 since 2018 places South Korea in territory no major country has previously occupied for sustained periods.
The drivers of South Korean fertility decline are well documented. Marriage rates have collapsed, with the median age at first marriage rising to 33.7 years for men and 31.2 for women. Approximately 40 percent of Korean men born in 1990 are projected to never marry. Since births occur overwhelmingly within marriage in Korea (with non-marital birth rates among the lowest in OECD countries), the marriage decline translates directly into fertility decline.
Economic factors compound the decline. Housing costs in Seoul rank among the highest globally relative to incomes. The Korean education system, with its intensive private tutoring expectations, makes raising children extremely expensive. Workplace cultures around long hours and limited parental leave have made combining work and family difficult, particularly for women.
South Korea Population by Region: A Detailed Breakdown
South Korea is divided into 17 first-level administrative divisions, including special cities, metropolitan cities, special self-governing cities, provinces, and special autonomous provinces. The distribution reflects extreme concentration in the Seoul Capital Area.
| Region | Type | 2026 Population (Est.) | Notes |
|---|---|---|---|
| Seoul Special City | Special City | 9.4 million | National capital |
| Gyeonggi Province | Province | 13.7 million | Surrounds Seoul |
| Incheon Metropolitan City | Metropolitan City | 3.0 million | Major port city |
| Busan Metropolitan City | Metropolitan City | 3.25 million | Second largest city |
| Gyeongsangnam Province | Province | 3.25 million | Includes Changwon |
| Gyeongsangbuk Province | Province | 2.5 million | Includes Pohang, Andong |
| Daegu Metropolitan City | Metropolitan City | 2.35 million | Southeastern central |
| Chungcheongnam Province | Province | 2.15 million | West central |
| Jeollanam Province | Province | 1.80 million | Southwestern |
| Jeollabuk Province | Province | 1.74 million | Southwestern |
| Chungcheongbuk Province | Province | 1.59 million | Central |
| Gangwon Special Self-Governing | Special Self-Governing | 1.52 million | Northeastern mountains |
| Daejeon Metropolitan City | Metropolitan City | 1.43 million | Central |
| Gwangju Metropolitan City | Metropolitan City | 1.41 million | Southwestern |
| Ulsan Metropolitan City | Metropolitan City | 1.10 million | Industrial southeast |
| Jeju Special Self-Governing | Special Self-Governing | 700,000 | Island province |
| Sejong Special Self-Governing | Special Self-Governing | 395,000 | Administrative capital |
Source: Statistics Korea (KOSIS) 2025 regional estimates and UN World Population Prospects 2024.
The Seoul Capital Area, comprising Seoul Special City, Gyeonggi Province, and Incheon Metropolitan City, holds approximately 26.1 million residents, more than half of the entire Korean population. The concentration is among the most extreme of any major country. Seoul itself has been declining since its 1992 peak as housing costs have pushed residents to surrounding Gyeonggi cities.
Outside the capital area, Busan in the southeast is the second largest city. Several provincial areas, including Jeollanam, Jeollabuk, and Gangwon, have been losing population for decades through both natural decline and internal migration toward Seoul. Sejong, established in 2012 as an administrative capital intended to relieve Seoul’s concentration, has grown rapidly but remains small relative to Seoul.
Demographic Profile in 2026
South Korea’s total fertility sits at approximately 0.75 children per woman in 2026, slightly recovered from the 0.72 low of 2024, but still the lowest in the world. Median age in South Korea is approximately 45.5 years, among the highest in the world.
Approximately 19 percent of South Korean residents were aged 65 or older in 2026, with the share projected to reach 35 percent by 2050 and possibly higher. The pace of aging is among the fastest in human history, with the elderly population doubling roughly every fifteen years.
Life expectancy at birth in South Korea stands at approximately 83.5 years overall, with women averaging approximately 86.5 years and men approximately 80.5 years. Korean female life expectancy now ranks among the highest in the world.
Policy Responses and Their Limits
The South Korean government has implemented an extensive pronatalist policy over the past two decades. Cumulative spending on demographic policy has exceeded 320 trillion won (approximately 230 billion U.S. dollars) since 2006. Programs have included expanded parental leave, childcare subsidies, housing benefits for families, cash incentives for childbirth, and various tax credits.
The effects have been limited. Fertility has continued declining despite the policy effort, suggesting that financial incentives alone cannot overcome the underlying cultural, economic, and structural drivers of low fertility. Recent policy proposals have moved toward more aggressive interventions, including potential exemptions from mandatory military service for fathers of multiple children, expanded housing allocations for larger families, and significant cash payments per child.
The Special Committee on Low Birth Rate and Aging Society, established in the presidential office, coordinates demographic policy across ministries. Recent presidential addresses have framed demographic decline as an existential national challenge requiring a whole-of-government response. Whether new approaches will produce results that previous efforts have not remains uncertain.
Future Projections
| Year | Projected Population | Notes |
|---|---|---|
| 2030 | 50.5 million | Continued gradual decline |
| 2040 | 48 million | Decline accelerating |
| 2050 | 45.5 million | Median age approaches 56 |
| 2075 | 35 million | Continued steep decline |
| 2100 | 25 million | Loss of more than half from 2020 peak |
Source: UN World Population Prospects 2024 medium variant.
Projections from the UN World Population Prospects 2024 revision suggest the South Korea population will fall to approximately 50.5 million by 2030, around 45.5 million by 2050, and approximately 25 million by 2100. The trajectory assumes fertility remains near current levels, modest immigration continues, and mortality improvements proceed gradually.
The South Korea population 2050 figure of approximately 45.5 million represents a loss of 6 million from the 2026 level, or roughly 12 percent. The 2100 figure of approximately 25 million implies a cumulative loss of more than half of the 2020 peak population. South Korea ranks among the steepest projected declines for any country, comparable in proportional terms to Japan and exceeded only by a few smaller European nations.
Frequently Asked Questions
What is the population of South Korea in 2026?
The South Korean population in 2026 stands at approximately 51.5 million residents, down from a peak of 51.83 million in 2020. The figure draws on the UN World Population Prospects 2024 revision and Statistics Korea releases.
What is South Korea’s fertility rate?
South Korea’s total fertility rate sits at approximately 0.75 children per woman in 2026, the lowest in the world. The rate has been below 1.0 since 2018 and reached a low of 0.72 in 2024.
Why is South Korean fertility so low?
South Korean low fertility reflects multiple factors, including collapsed marriage rates (median age at first marriage now over 31 for women), extreme housing costs in Seoul, the costly, intensive education system with private tutoring, and workplace cultures that make combining career and family difficult.
Which South Korean city has the largest population?
Seoul is the largest South Korean city, with approximately 9.4 million residents. The broader Seoul Capital Area, including Gyeonggi Province and Incheon, holds approximately 26.1 million, more than half of the entire Korean population.
What is the median age in South Korea?
The median age in South Korea sits at approximately 45.5 years in 2026, among the highest in the world. The figure is projected to reach approximately 56 by 2050 as aging accelerates.
How has the South Korean government responded to low fertility?
The South Korean government has spent more than 320 trillion won (approximately 230 billion U.S. dollars) on demographic policy since 2006. Programs include parental leave, childcare subsidies, housing benefits, and cash incentives. Despite extensive effort, fertility has continued declining.
What is the life expectancy in South Korea?
Life expectancy at birth in South Korea stands at approximately 83.5 years overall, with women averaging approximately 86.5 years and men approximately 80.5 years. Korean female life expectancy ranks among the highest in the world.
What is the projected South Korean population in 2100?
South Korea’s population is projected to fall to approximately 25 million by 2100 under the UN medium variant, representing a loss of more than half of the 2020 peak. The projection ranks among the steepest declines for any country.
When did South Korea’s population peak?
South Korea’s population peaked at approximately 51.83 million in 2020 and has been gradually declining since. The decline is projected to accelerate through the 2030s and 2040s as fertility cohort effects compound.
How many people live in the Seoul Capital Area?
The Seoul Capital Area, including Seoul Special City, Gyeonggi Province, and Incheon Metropolitan City, holds approximately 26.1 million residents, more than half of the entire South Korean population.
Sources
- United Nations Department of Economic and Social Affairs, Population Division.
- World Population Prospects 2024 revision.
- Statistics Korea (KOSIS), Population Estimates and Vital Statistics 2024 and 2025.
- World Bank Open Data, World Development Indicators, 2024 and 2025 updates.
- Korean Ministry of Health and Welfare, Special Committee on Low Birth Rate and Aging Society reports 2024.
- Live national and regional counters at worldpopulationclock.net.