South Korea Population 2026
South Korea Population 2026 figures place the country at approximately 51.6 million people, continuing a gradual decline from the nation’s historic peak of 51.83 million reached in 2020. According to Statistics Korea and United Nations population projections, South Korea now ranks as the 31st most populous nation on Earth and the 13th in Asia, even as it holds the unwanted distinction of the world’s lowest fertility rate. The country’s population growth rate for 2026 is projected at -0.14%, reflecting a demographic reality where deaths have outnumbered births every year since 2020, when South Korea recorded a population decline for the first time in modern records.
Yet 2026’s population picture carries a genuinely notable subplot: after eight consecutive years of decline, South Korea’s fertility rate rose in 2024 for the first time in nine years, climbing to 0.75 from a record-low 0.72 in 2023, fueled by the biggest marriage boom since 1970. Whether this marks a genuine turning point or a temporary pandemic-recovery blip remains one of the most closely watched demographic questions in the world. This report breaks down the latest verified South Korea Population 2026 statistics — covering national totals, fertility trends, age structure, and regional distribution — using data from Statistics Korea, the United Nations.
Interesting Facts About South Korea Population 2026
| Fact Category | Details |
|---|---|
| Total Population (2026) | ~51.6 million (51,600,388 per Worldometer/UN estimate) |
| Global Population Rank | 31st most populous country |
| Population Peak | 51.83 million, reached in 2020 |
| 2026 Growth Rate | -0.14% |
| Total Fertility Rate (2024, most recent confirmed annual data) | 0.75, first rise in 9 years |
| Total Fertility Rate Historical Low (2023) | 0.72 |
| Median Age (2026) | 46.2 to 47.2 years |
| Life Expectancy (2026) | 84.64 years, 5th highest globally |
| Population Density (2026) | 531 people per km² |
| Seoul Capital Area Population | ~26.1 million, over half the national total |
Data Source: Statistics Korea, United Nations World Population Prospects (2024 Revision)
The 51.6 million figure driving South Korea’s 2026 statistics represents a country in genuine demographic contraction, having slipped from its 2020 peak of 51.83 million through five consecutive years of natural population decline. What makes South Korea’s situation globally distinctive isn’t simply that its population is shrinking — many developed nations face similar pressures — but the speed and severity of the underlying fertility collapse driving it. South Korea has been the only OECD member nation with a total fertility rate below 1.0 since 2018, a threshold most demographers consider a marker of genuine national crisis.
The 2024 fertility rate increase to 0.75, while still catastrophically below the 2.1 replacement level needed for population stability, matters enormously as a directional signal. A Statistics Korea official described it during a February 2025 briefing as reflecting “a change in social value, with more positive views about marriage and childbirth,” while crediting a surge in people in their early 30s and delayed pandemic-era marriages finally taking place. Whether this modest rebound continues through 2026 and beyond, or proves a temporary blip, will significantly shape how quickly South Korea’s total population declines over the coming decades.
South Korea Population Growth and Decline Statistics 2026
| Metric | Data |
|---|---|
| 2020 Population (Historic Peak) | 51.83 million |
| 2025 Population | 51.67 to 51.7 million |
| 2026 Population | ~51.6 million |
| Net Daily Population Change (2026) | Approximately -200 people/day |
| Daily Births (2026) | ~683 to 684 |
| Daily Deaths (2026) | ~1,055 |
| Net Daily Immigration (2026) | +172 people |
| Consecutive Years of Natural Population Decline | 5 years (since 2020) |
| First Year Deaths Exceeded Births | 2020 |
Data Source: Worldometer, World Population Review, Statistics Korea
South Korea Population Trajectory (Millions)
2020 (Peak) |######################################## | 51.83
2025 |####################################### | 51.70
2026 |###################################### | 51.60
South Korea’s population decline, while modest in percentage terms at roughly -0.14% annually, represents a genuine structural reversal after decades of continuous growth throughout the 20th century. The daily arithmetic is stark: with roughly 683 to 684 births against 1,055 deaths each day, natural decrease alone would reduce the population by well over 135,000 people annually, a shortfall only partially offset by net immigration of approximately 172 people per day, or roughly 63,000 annually. This combination consistently produces the net loss of around 200 people daily that defines South Korea’s current trajectory.
The significance of 2020 as the inflection point cannot be overstated: it marked the first time in the country’s modern statistical record that deaths outnumbered births nationally, a milestone that arrived years earlier than Statistics Korea itself had originally forecast. The agency’s earlier projections had suggested population decline might not begin until 2028, with some models pointing even further out to 2032 — meaning South Korea’s demographic transition arrived roughly a decade ahead of official expectations, a pattern demographers frequently cite as a warning sign for how quickly low-fertility societies can shift from growth to contraction once the underlying trend takes hold.
South Korea Fertility Rate and Marriage Boom Statistics 2026
| Metric | Data |
|---|---|
| 2023 Total Fertility Rate | 0.72 (record low at the time) |
| 2024 Total Fertility Rate | 0.75, first increase in 9 years |
| 2024 Total Births | 238,300, up 3.6% from 2023 |
| 2023 Total Births | 230,000 (record low) |
| 2024 Crude Birth Rate | 4.7 per 1,000 population |
| 2024 Marriages | 222,422 couples, up 14.9% |
| Marriage Increase Significance | Biggest annual jump since data collection began in 1970 |
| Government Fertility Rate Target | 1.0 by 2030 |
| South Korea’s Global Fertility Rank | Lowest in the world |
Data Source: Statistics Korea, Reuters, ABC News, NBC News
South Korea Fertility Rate Trend (Children per Woman)
2015 |################################# | 1.24
2023 |################### | 0.72
2024 |#################### | 0.75
Replacement Level|###################################██| 2.10
The 14.9% surge in marriages during 2024 — the largest single-year jump since South Korea began publishing marriage data in 1970 — stands as the clearest leading indicator behind the fertility rate’s modest but historically significant rebound. Because South Korea maintains one of the world’s strongest correlations between marriage and childbearing, with the vast majority of births occurring within marriage and roughly 62.8% of South Koreans opposing births outside marriage according to government survey data, the marriage rebound directly foreshadows continued birth increases with the typical one-to-two-year lag between wedding and first child. Statistics Korea official Park Hyun-jeong attributed the trend to “pandemic delays” finally resolving, alongside a genuine increase in the population of people in their early 30s, the prime marrying and childbearing cohort.
Despite the positive direction, context matters enormously: even at 0.75, South Korea’s fertility rate remains barely one-third of the 2.1 needed for long-term population stability, and the country has been the sole OECD nation below 1.0 since 2018. The government’s own target — raising the rate to just 1.0 by 2030 — illustrates how modest the ambition has become relative to genuine replacement-level fertility. For international context on how this compares to the world’s other fertility outliers, our Taiwan Population Statistics report documents Taiwan’s own fertility rate of 0.72, now statistically tied with or even below South Korea’s recent figures, underscoring that this crisis extends well beyond Korea’s borders across East Asia’s most economically developed societies.
South Korea Age Structure and Aging Population Statistics 2026
| Metric | Data |
|---|---|
| Median Age (2026) | 46.2 to 47.2 years |
| Global Average Median Age (comparison) | 31 years |
| Population Aged 0–14 (2024) | 11.3% |
| Population Aged 15–64 (2024) | 69.4% |
| Population Aged 65 and Over (2024) | 19.3% |
| Life Expectancy at Birth (2026) | 84.64 years |
| Male Life Expectancy | 80.3 to 81.6 years |
| Female Life Expectancy | 86.6 to 87.5 years |
| Global Life Expectancy Rank | 5th highest worldwide |
| Median Age at First Marriage (Women) | Over 31 years |
Data Source: CIA World Factbook (Demographics of South Korea), StatisticsTimes, Worldometer
South Korea Age Distribution, 2024 (% of Population)
Ages 0-14 |##### | 11.3%
Ages 15-64 |################################### | 69.4%
Ages 65+ |########## | 19.3%
South Korea’s median age of 46.2 to 47.2 years — compared with a global average of just 31 years — places it among the oldest societies on the planet, a direct consequence of the same fertility collapse driving the country’s overall population decline. With only 11.3% of the population under 15, against 19.3% aged 65 and older, South Korea’s demographic pyramid has effectively inverted from the traditional broad-based structure into a shape that increasingly resembles a contracting cylinder, with each successive younger cohort smaller than the one before it — a pattern demographers classify as a “constrictive” population pyramid.
Compounding the fertility crisis is South Korea’s genuinely exceptional life expectancy of 84.64 years, the fifth-highest in the world, trailing only Monaco, San Marino, Hong Kong, and Japan. While longer lifespans are unambiguously positive for individuals, the combination of very low births and very high longevity produces exactly the demographic squeeze policymakers most fear: a shrinking working-age base supporting a rapidly growing elderly population. The delayed median age at first marriage, now over 31 for women, reflects deeper structural pressures — extreme Seoul housing costs, an intensely competitive and expensive private education system, and workplace cultures widely described as difficult to reconcile with family life — all factors Statistics Korea and independent researchers cite as root causes behind the fertility collapse. For a comparative look at how a similarly aging, slower-growing developed nation is managing its own demographic transition through age-group data and generational analysis, see our Britain Population Statistics report.
Seoul and Regional Population Distribution Statistics 2026
| Region | Population Data |
|---|---|
| Seoul (City) Population | 9.2 to 9.4 million |
| Seoul’s Share of National Population | 17.86% |
| Seoul Capital Area (Seoul + Gyeonggi + Incheon) | ~26.1 million |
| Seoul Capital Area Share of National Population | Over 50% |
| National Urban Population Share | 81.18% to 92.9% (source-dependent) |
| Seoul’s 2024 Birth Rate | 0.58 — lowest of any region nationally |
| Only Major Center to Grow in 2024 | Sejong (administrative capital) |
| Population Density (National, 2026) | 531 people per km², 25th most dense globally |
Data Source: World Population Review, NBC News, StatisticsTimes
Seoul Capital Area Share of South Korea's Population
Seoul Capital Area (26.1M) |#####################| Over 50%
Rest of South Korea |#####################| Under 50%
The concentration of South Korea’s population within the Seoul Capital Area — encompassing Seoul proper alongside surrounding Gyeonggi Province and Incheon — represents one of the most extreme cases of urban primacy among major developed economies, with roughly 26.1 million people, more than half the entire nation, living within this single metropolitan region. Seoul itself, home to between 9.2 and 9.4 million residents, paradoxically posts the lowest birth rate of any region in the country at just 0.58, a figure that starkly illustrates how the capital’s extreme cost of living and intensely competitive labor and housing markets actively suppress childbearing even as the city continues attracting young people from across the nation for education and employment.
This internal migration pattern produces a genuinely uneven demographic map: while Seoul and its surrounding capital region continue drawing population from other parts of the country, most of South Korea’s other major population centers experienced net population loss in the most recent annual data, with only the purpose-built administrative capital of Sejong recording growth. This dynamic — a hyper-concentrated capital region simultaneously acting as the country’s primary population magnet and its lowest-fertility zone — creates a genuine policy paradox for South Korean planners attempting to simultaneously address regional depopulation outside Seoul and chronically low birth rates within it.
South Korea Population Projections and Long-Term Outlook Statistics 2026
| Projection Metric | Data |
|---|---|
| 2072 Population Projection (Statistics Korea) | 36.22 million |
| 2100 Population Projection (Alternative Estimate) | 29.5 million |
| Decline from 2020 Peak to 2072 Projection | Roughly 30% |
| Original Decline Onset Estimate | Around 2032 |
| Revised (Earlier) Decline Onset Estimate | Before 2028 |
| Actual Decline Onset | 2020 — years ahead of both forecasts |
| South Korea’s OECD Sub-1.0 Fertility Streak | Since 2018, ongoing |
| Government Fertility Target Year | 2030 (target: 1.0) |
Data Source: Statistics Korea, GlobalSecurity.org, United Nations World Population Prospects
South Korea Long-Term Population Projections
2020 (Peak) |#####################################| 51.83M
2072 (Proj.) |######################### | 36.22M
2100 (Proj.) |################### | 29.5M
Statistics Korea’s own long-range projection places the national population at 36.22 million by 2072, a decline of roughly 30% from the 2020 peak, while some independent long-term models extend the trajectory even further, projecting a population as low as 29.5 million by 2100 if current fertility trends fail to meaningfully improve. What makes these projections particularly sobering is the demonstrated track record of South Korea’s demographic transition consistently outpacing official forecasts — the country’s population began declining in 2020, years earlier than the 2028 and 2032 onset dates previously modeled by the country’s own statistics agency, a pattern that, if it continues, suggests even the current 2072 and 2100 projections could understate the true pace of contraction.
The scale of South Korea’s demographic challenge becomes clearer when set against countries managing comparable, though generally less severe, population pressures. Our Canada Population Statistics report documents a country relying heavily on immigration to sustain growth despite its own below-replacement fertility rate, offering a useful contrast to South Korea’s more historically closed, immigration-resistant demographic model. Whether South Korea’s 2024 marriage and fertility uptick represents the beginning of a genuine, sustained reversal, or merely a temporary pandemic-recovery adjustment against an otherwise unchanged long-term trajectory, will likely remain one of the defining open questions in global demography through the remainder of the 2020s.
Disclaimer: The data research report we present here is based on information found from various sources. We are not liable for any financial loss, errors, or damages of any kind that may result from the use of the information herein. We acknowledge that though we try to report accurately, we cannot verify the absolute facts of everything that has been represented.
