Countries with the Most Centenarians Per Capita (100+ Year Olds Ranked)

In 1950, roughly 200,000 people alive on Earth had passed their 100th birthday. By 2024, the UN Population Division estimated that number had grown to approximately 935,000. By 2100, projections point toward 25 million. That 125-fold increase over 150 years is not a fluke — it reflects cascading improvements in infant survival, infectious disease control, nutrition, and chronic disease management. But centenarians are not evenly distributed. Understanding which countries produce the most — and why — tells us something concrete about what long life actually requires.

How these rankings work

Q: How do researchers count centenarians across countries? A: Centenarian counts depend on birth registration quality, which varies considerably. In high-income countries with strong civil registry systems (Japan, France, Sweden), figures are reliable. In lower-income countries or those with historical gaps in record-keeping, numbers may be underestimated or — as seen in some Soviet-era Caucasian communities — overstated due to age documentation errors.

Methodology: Absolute centenarian counts come from national census authorities and the UN World Population Prospects 2024. Per-capita rates are calculated per 100,000 population using World Bank 2024 population figures. Where official age validation is poor, figures are noted accordingly.

Source: UN Department of Economic and Social Affairs, World Population Prospects 2024 — https://population.un.org/wpp/

Countries with the most centenarians (per 100,000 population)

Rank	Country	Centenarians per 100,000	Absolute count (approx.)
1	Japan	97	120,000
2	France	48	32,000
3	Italy	40	24,000
4	Spain	36	17,000
5	Sweden	32	3,300
6	Greece	29	3,100
7	Switzerland	30	2,600
8	Australia	26	6,700
9	United Kingdom	23	15,000
10	United States	19	64,000
11	Canada	21	8,600
12	South Korea	18	9,400
13	Germany	19	16,000
14	China	2.8	39,000
15	Costa Rica	18	900

Note: Japan's figure updated from earlier 92,000 count to ~120,000 per UN 2024 projections. China's per-capita rate appears low due to population size; absolute count is the world's third-highest.

Source: UN DESA World Population Prospects 2024; national census offices

Where this data comes from

The UN Department of Economic and Social Affairs (DESA) compiles centenarian figures from national census authorities, vital registration systems, and demographic surveys. The 2024 World Population Prospects represent the most recent global assessment, incorporating data from countries with strong birth registration systems (Japan, European nations) and estimates from countries with less complete historical records. Per-capita rates are calculated using World Bank 2024 population estimates. The data shown here reflects reported figures; actual centenarian populations in lower-income nations with weaker vital registration infrastructure may differ from reported figures. Japan's remarkable concentration reflects both exceptional longevity and historically rigorous age documentation — a combination that cannot be assumed in all countries on the ranking.

Analytical insight: the concentration of longevity

The extreme concentration of centenarians in wealthy, European-tradition countries is not accidental but reflects specific structural prerequisites. Japan, France, Italy, and Spain together account for nearly half the world's reported centenarians despite representing only about 5% of global population. These countries share four characteristics: universal healthcare systems with preventive care access, strong early-life survival (nearly 100% of births survive infancy), low historical rates of infectious disease mortality, and multi-generational stability enabling reliable genealogical records. China's position illustrates the gap: 39,000 centenarians in a nation of 1.4 billion yields an extraordinarily low per-capita rate, suggesting either genuine biological differences in extreme longevity distribution or systematic underreporting in countries with complex historical record-keeping. The Blue Zones (Sardinia, Okinawa, Nicoya Peninsula, Ikaria, Loma Linda) further reveal that centenarian concentration at local scales tells a different story than national averages — not national wealth alone but specific dietary, social, and purpose-driven cultural practices drive the difference between a country with 1 centenarian per 100,000 and one with 97.

Historical context: how centenarians became common

For most of human history, reaching 100 was so improbable it was treated as a miracle. Medieval European records document the occasional monk or noblewoman cited as "more than 100 years old," but verification was impossible and claims were often inflated. The first scientifically validated supercentenarian (a person over 110) was Pierre Joubert of Canada, verified to have lived 113 years, dying in 1814.

The centenarian explosion is a product of layered 20th-century achievements. Child mortality fell first — in 1900, roughly one-third of children in wealthy countries died before age five. Eliminating those early deaths added years to average life expectancy without anyone living longer in old age. Then antibiotic discovery in the 1940s and vaccination campaigns through the 1950s–1970s further extended survival. Cardiovascular disease treatment — statins, bypass surgery, antihypertensives — reduced the primary killer of middle-aged and older adults from the 1960s onward.

The result is a demographic pipeline effect: more people survive early life, more of those reach middle age, more of those reach old age, and a growing fraction make it to 100. Japan's surge from roughly 100 centenarians in 1963 — the year the Japanese government began its annual centenarian census — to 120,000 in 2024 illustrates this pipeline in a single lifetime.

Source: Pew Research Center, "World's centenarian population projected to grow eightfold by 2050" — https://www.pewresearch.org/short-reads/2016/04/21/worlds-centenarian-population-projected-to-grow-eightfold-by-2050/

Why Japan leads — and what the data actually shows

Japan has held the top position in centenarian count and per-capita rate for decades. The mechanisms are specific and measurable:

Diet. Traditional Japanese diets — particularly in longevity hotspot Okinawa — center on fish, vegetables, fermented foods (natto, miso), and minimal saturated fat. The Okinawan practice of hara hachi bu, or eating to roughly 80% fullness, functions as a mild, sustained form of caloric restriction. Animal studies consistently show caloric restriction extends lifespan in mammals; the Okinawan cohort is one of the better human analogs.

Social architecture. Japanese elderly people maintain social roles well into advanced age. In Okinawa, moai — informal social support groups formed in childhood — persist throughout life, providing mutual aid, regular contact, and a reason to remain engaged. Social isolation is associated with accelerated cognitive decline and elevated cortisol; Japanese cultural norms structurally reduce isolation in old age in ways that Western retirement models often do not.

Universal healthcare. Japan's national health insurance system, introduced in 1961, gives elderly people equal access to preventive care, cancer screening, and chronic disease management regardless of income. Cardiovascular disease — the leading killer of people in their 70s and 80s — is more aggressively managed in Japan than in most countries.

Low female smoking rates. Women constitute approximately 80% of all centenarians globally. Japanese women have among the lowest smoking rates of any wealthy nation, meaningfully reducing lung cancer and cardiovascular disease mortality in the demographic most likely to produce centenarians.

Think of the centenarian pipeline as a relay race: Japan runs all four legs well — early survival, cardiovascular health, social connection, and primary care — while most other nations stumble on at least one.

Source: Willcox BJ et al., "Caloric restriction, the traditional Okinawan diet, and healthy aging," Annals of the New York Academy of Sciences, 2007 — https://pubmed.ncbi.nlm.nih.gov/17986602/

The Okinawan reversal: a warning

Okinawa was once the world's most celebrated longevity region — per-capita centenarian rates three to four times Japan's national average. That advantage has significantly eroded, and the reason is instructive.

After World War II, Okinawa became host to major US military bases. American fast food culture entered the local diet — hamburgers, Spam, and processed food replaced sweet potato as the dietary staple. The current cohort of 60-year-old Okinawans — people who grew up in the post-war diet shift — have health metrics substantially worse than the current centenarians had at the same age. Obesity rates in Okinawa now exceed the Japanese national average.

The implication is important: longevity advantage is not permanent. It is the product of maintained behaviors, not fixed geography or genetics. The centenarians alive in Okinawa today are survivors of pre-Westernization food habits. The next generation almost certainly will not match them.

The Blue Zones: where centenarian concentration is highest

Five specific geographic areas have been documented to produce centenarians at rates three to ten times their national average. Researcher Dan Buettner labeled these "Blue Zones" after the blue ink researchers used to circle them on early maps.

Sardinia, Italy — Barbagia region

The mountainous interior of Sardinia produces something unusual: high concentrations of male centenarians. In most populations, women outnumber men among centenarians by roughly four to one. In the Barbagia highlands, the ratio approaches one to one. The proposed explanations: Sardinian men worked as shepherds in steep mountain terrain into advanced age, creating sustained, low-intensity physical activity. Their diet centered on pecorino cheese, sourdough flatbread (carta da musica), beans, and local Cannonau wine — a Grenache-based red with notably high polyphenol content. Social structures kept men embedded in community rather than isolated.

Source: Poulain M et al., "Identification of a geographic area characterized by extreme longevity in the Sardinia island," Experimental Gerontology, 2004 — https://pubmed.ncbi.nlm.nih.gov/15050996/

Okinawa, Japan

Famous for long-living women — the original female centenarian hotspot. Key factors: hara hachi bu eating, moai social groups, high turmeric consumption (curcumin is an anti-inflammatory compound), and historically low meat intake. The sweet potato provided most caloric energy at a high nutrient-to-calorie ratio. As noted above, this advantage is declining in younger cohorts.

Nicoya Peninsula, Costa Rica

One of only two non-wealthy-country Blue Zones — significant because it refutes the "you need a rich country to produce centenarians" assumption. Nicoya centenarians maintain strong plan de vida (reason for living), drink hard water high in calcium and magnesium, eat corn tortillas providing calcium and resistant starch, and sustain multigenerational family structures that prevent elder isolation. Physical activity from subsistence-level farming continues into very old age.

Ikaria, Greece

This remote Aegean island is notable for a specific finding: Ikarian elderly people show dementia rates approximately 80% lower than US equivalents at the same age. The diet is Mediterranean — heavy in olive oil, vegetables, legumes, and fish. The Greek Orthodox fasting calendar — which restricts animal products roughly 180 days per year — reduces average caloric intake substantially without anyone consciously dieting. Afternoon naps and a culture of unhurried daily life reduce chronic stress load.

Loma Linda, California

A community of Seventh-day Adventists whose religious practices — vegetarianism or veganism, no tobacco, regular Sabbath rest, strong community structure — produce life expectancy approximately seven to ten years above the US average. Loma Linda is a useful natural experiment: these are ordinary Americans, living in the same healthcare system, exposed to the same environment, but practicing a specific lifestyle that dramatically extends lifespan.

Source: Fraser GE and Shavlik DJ, "Ten years of life: is it a matter of choice?" Archives of Internal Medicine, 2001 — https://pubmed.ncbi.nlm.nih.gov/11483159/

What all Blue Zones share: the common factors

Despite spanning five countries on three continents, the Blue Zones show a convergent set of behaviors. Think of these not as a checklist but as a self-reinforcing system: each factor makes the others easier to maintain.

Natural movement. Physical activity is embedded in daily life — shepherding, gardening, walking to the market — rather than scheduled gym workouts. The distinction matters because embedded activity is consistent and lifelong rather than periodic.

Purpose. Having a clear reason to wake up each morning — ikigai in Japanese, plan de vida in Spanish — is associated with lower mortality in multiple prospective cohort studies. Purposelessness is measurably bad for health; it correlates with elevated inflammatory markers.

Stress management. Every Blue Zone has a routine for downshifting — prayer, napping, happy hour with friends. Chronic cortisol elevation damages cardiovascular tissue, impairs immunity, and accelerates cellular aging. Downshift rituals reduce chronic stress load without any medical intervention.

Plant-centered eating. Beans — whether fava in Sardinia, soybeans in Okinawa, or black beans in Nicoya — are the dietary cornerstone across all five zones. Meat is present but peripheral: several servings per month, not per day.

Belonging. Four of the five Blue Zones are characterized by strong religious community participation. Studies of Adventists suggest that faith community membership adds four to fourteen years of expected life, likely through the combined effects of social support, abstention from tobacco and alcohol, and shared health behaviors.

Social structures that protect the old. Keeping elderly people in the center of family and community life — rather than moving them to retirement facilities — appears protective. Elder isolation is measurably dangerous; Blue Zone cultural norms prevent it structurally.

Source: Buettner D, "The Blue Zones: Lessons for Living Longer from the People Who've Lived the Longest," National Geographic Society, 2008

The genetics question: how much is inherited?

The intuitive assumption is that centenarians have exceptional genes. The data is more nuanced. Studies of identical twins — who share 100% of their DNA — suggest that genetic factors account for approximately 20–30% of lifespan variation. The remaining 70–80% is attributed to environment, lifestyle, and chance.

That said, certain genetic variants are significantly overrepresented in centenarian populations. The FOXO3 variant — found in multiple independent centenarian cohorts across ethnically diverse populations — appears to increase survival through effects on insulin signaling and stress resistance. The APOE2 allele (as opposed to the APOE4 allele associated with Alzheimer's risk) is also more common among centenarians. But these variants are neither necessary nor sufficient: many centenarians carry none of the "longevity alleles" identified so far, and carriers do not automatically reach 100.

Think of genetics as the hand you're dealt and lifestyle as how you play it. The twin studies suggest the hand determines at most a third of the outcome.

Source: Christensen K et al., "Genetic determinants of human health span and life span," Geriatrics and Gerontology International, 2006 — https://pubmed.ncbi.nlm.nih.gov/16803497/

Supercentenarians: the extreme edge

A supercentenarian is a person who has reached 110 years of age. These individuals are extraordinarily rare — the Gerontology Research Group estimates perhaps 100–300 verified living supercentenarians worldwide at any time, out of a global population of eight billion.

The verified longevity record belongs to Jeanne Calment of France, who died in 1997 at 122 years and 164 days — a record that has stood for nearly three decades. Some researchers have questioned the record, arguing that her daughter may have assumed her identity to avoid inheritance taxes, but the consensus among gerontologists remains that the documentation is valid.

Japan dominates the supercentenarian rankings: at any given time, the oldest verified living person is usually a Japanese woman in her early 110s. As of recent records, Kane Tanaka of Japan, who died in 2022 at 119 years and 107 days, held the record for most of the previous five years.

The gender skew at the extreme end is pronounced: among verified supercentenarians, women outnumber men by approximately nine to one — an even more extreme version of the general centenarian gender gap.

Source: Gerontology Research Group, verified supercentenarian database — https://grg.org

The coming centenarian wave: what it means for societies

The UN's projection of 25 million centenarians by 2100 implies enormous social changes. Healthcare systems designed around populations where a 90-year-old is uncommon will need to accommodate one where reaching 100 is routine for the top decile of health outcomes.

Japan is already living this transition. With over 120,000 centenarians and a population that is the world's oldest by median age, Japan faces the practical challenges that other rich countries will confront over the coming decades: geriatric medical workforce shortages, pension system sustainability, dementia care infrastructure, and the question of what meaningful social participation looks like for people in their second century.

The economic cost is substantial. Long-term care spending in Japan already exceeds 2% of GDP. Germany, South Korea, and Italy face similar trajectories within two to three decades.

But the framing of "centenarians as a burden" misses a finding consistent across Blue Zone research: the healthiest centenarians are not simply surviving longer — they are compressing morbidity, spending fewer years in poor health at the end of life. The Okinawan centenarians studied by Willcox and colleagues showed that many maintained functional independence until their late 90s, with a short terminal decline. The goal of longevity research is not just more years but more healthy years — a distinction captured in the concept of "healthspan" versus lifespan.

Frequently asked questions

Q: What is a supercentenarian? A: A supercentenarian is any person aged 110 or older. They are extraordinarily rare — perhaps 100–300 verified globally at any time. The verified longevity record is held by Jeanne Calment of France, who died in 1997 at 122 years and 164 days.

Q: Is longevity genetic or lifestyle? A: Twin studies suggest genetics account for approximately 20–30% of lifespan variation. The majority is lifestyle and environment — meaning most longevity advantages observed in Blue Zones are theoretically replicable. Specific variants (FOXO3, APOE2) are overrepresented in centenarians but are neither necessary nor sufficient for extreme longevity.

Q: Why do women live longer than men everywhere? A: The gender longevity gap — women live approximately five years longer globally — has biological and behavioral components. Biologically: estrogen has cardioprotective effects; men have higher baseline rates of cardiovascular disease. Behaviorally: men smoke more, drink more, take greater physical risks, and seek medical care less readily. The gap narrows in populations with low female smoking rates, suggesting the behavioral component is substantial.

Q: Are centenarian numbers reliable in poorer countries? A: Not always. In countries with incomplete birth registration, centenarian figures may be overstated because age documentation is poor. The dramatic longevity claims from Soviet-era Caucasian communities — including alleged 150-year-olds in Georgia and Azerbaijan — were largely invalidated when researchers discovered that men had often assumed older relatives' identities during wartime to avoid military service.

Q: Does diet matter more than genetics for reaching 100? A: Based on available evidence, yes — but diet does not operate in isolation. The Blue Zone research consistently finds that diet, social connection, physical activity, and sense of purpose act together. Attempting to replicate a Blue Zone diet while living in social isolation or without physical activity is unlikely to produce the same outcomes.

Q: What will happen to centenarian numbers in the next 50 years? A: The UN projects centenarian numbers will grow from roughly 935,000 in 2024 to approximately 3.7 million by 2050 and 25 million by 2100. The largest absolute growth will be in Asia, led by China and India as their populations age. Japan's centenarian proportion will likely remain among the world's highest throughout the century.

The takeaway

Japan leads the world in centenarians — a product of diet, social integration, universal healthcare, and cultural practices around purpose and aging that compound over a lifetime. The Blue Zone research points consistently to the same cluster of factors across five radically different geographies: plant-centered diet, daily physical movement, genuine social bonds, a reason to wake up each morning, and stress relief baked into the daily routine. These are overwhelmingly non-genetic and theoretically replicable. The coming wave of 25 million centenarians by 2100 is not a problem to be managed — it is a demographic consequence of one of humanity's greatest achievements. Whether those extra years are healthy and purposeful is the question that the Blue Zones begin to answer.

Sources

• UN DESA World Population Prospects 2024 — https://population.un.org/wpp/
• Pew Research Center, centenarian projections — https://www.pewresearch.org/short-reads/2016/04/21/worlds-centenarian-population-projected-to-grow-eightfold-by-2050/
• Willcox BJ et al., Okinawan diet and healthy aging, Annals of NYAS — https://pubmed.ncbi.nlm.nih.gov/17986602/
• Poulain M et al., Sardinian longevity zone, Experimental Gerontology — https://pubmed.ncbi.nlm.nih.gov/15050996/
• Fraser GE and Shavlik DJ, Adventist health study, Archives of Internal Medicine — https://pubmed.ncbi.nlm.nih.gov/11483159/
• Gerontology Research Group — https://grg.org

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