San Marino Population 2026 | Live Population By Region
The World’s Oldest Republic Now Has One of Its Oldest Populations
San Marino claims to be the world’s oldest continuously surviving republic, founded, according to tradition, in the year 301 by a Christian stonemason named Marinus fleeing persecution in the Roman Empire’s Italian peninsula. Seventeen centuries later, San Marino carries a different kind of “oldest” title: with a median age of roughly 49 to 50 years, it ranks third among all 196 countries tracked globally for median population age, trailing only Monaco and, depending on the year’s data, one or two other microstates. A nation founded on the idea of permanence has, in its demographic profile, become almost a case study in how thoroughly a population can age when fertility falls far enough for long enough.
The Numbers Behind the Aging
San Marino’s population in 2026 sits at approximately 34,073. Its total fertility rate, at just 1.15 to 1.54 children per woman depending on the year and source, ranks among the lowest recorded anywhere in Europe, a continent that already has some of the lowest fertility rates in the world.
Life expectancy, meanwhile, runs remarkably high, around 85 to 86 years at birth, among the top handful of nations globally. Combine a fertility rate this far below replacement with life expectancy this high, sustained over decades, and the arithmetic produces exactly the age structure San Marino now has: only around 12 to 14 percent of the population under 15, while residents 65 and older make up somewhere between 21 and 22 percent, and climbing.
| Indicator | Figure |
|---|---|
| 2026 population | 34,073 |
| Median age | 49 to 50 years |
| Total fertility rate | 1.15 to 1.54 children per woman |
| Life expectancy at birth | 85 to 86 years |
| Population aged 65+ | 21% to 22% |
| Population density | Around 560/km² |
How a Republic This Old Ended Up This Small
San Marino’s population history is a study in stability rather than dramatic swings. Landlocked entirely within Italy, covering just 61 square kilometers, the republic’s population has grown only gradually across the twentieth and twenty-first centuries, never experiencing the sharp expansion or contraction seen in colonial territories or resource-driven economies elsewhere in this dataset. What growth has occurred has come substantially from immigration, primarily from Italy itself, given the two nations’ deep economic and cultural integration, rather than from any domestic baby boom.
San Marino’s economy runs on banking, light manufacturing, and tourism tied to its status as one of Europe’s smallest and most historically distinctive states, none of which requires or produces the kind of large-scale labor immigration seen in Caribbean or Gulf microstates. The population has simply aged in place, generation after generation, following demographic patterns that track closely with those of its much larger neighbor, Italy, itself one of Europe’s oldest societies.
Population Growth Has Actually Turned Negative
By 2023, San Marino’s population growth rate had turned slightly negative, at approximately -0.7 percent, driven by a combination of deaths now outpacing births and modest net outward migration. Strip out migration entirely, and the natural rate of change would still be negative, though less severely so, at around -0.2 percent, underscoring that San Marino’s low fertility rate alone is now sufficient to shrink the population even before accounting for anyone moving away.
This represents a meaningful shift from the moderate growth San Marino recorded through much of the twentieth century, and it places the republic firmly among the small group of European nations already experiencing outright natural population decline rather than merely slowing growth.
Almost Everyone Is Sammarinese or Italian
San Marino’s population is remarkably homogeneous by European standards, split predominantly between Sammarinese nationals and a substantial Italian minority, reflecting centuries of close integration with the surrounding region even as San Marino has maintained formal political independence throughout. Roman Catholicism claims the overwhelming majority of religious affiliation, over 90 percent by most estimates, a legacy consistent with the republic’s foundational Christian origin story and its continued cultural alignment with Italy. Italian is the sole language of daily life, government, and education.
What Aging This Fast Actually Means Day to Day
San Marino’s demographic profile creates practical governance questions that loom larger here than in most nations, precisely because the republic is so small that its age structure shows up immediately in everything from healthcare demand to workforce planning. With nearly a quarter of the population 65 or older and climbing, and a shrinking base of working-age taxpayers to support pension and healthcare systems, San Marino faces the same fiscal pressures larger aging nations like Japan or Italy face, but with far less room to absorb the strain through economies of scale or large-scale immigration, given the republic’s tiny size and its historically selective approach to residency and citizenship.
United Nations projections suggest San Marino’s median age could climb further still, toward roughly 51.8 years by 2050, which would push the republic even further up the global ranking of oldest national populations, a trajectory with no obvious reversal point given how entrenched the low fertility pattern has become.
Frequently Asked Questions
What is San Marino’s population in 2026?
Approximately 34,073 people, based on estimates consistent with United Nations World Population Prospects methodology.
Why does San Marino have such an old population?
A combination of very low fertility, around 1.15 to 1.54 children per woman, and very high life expectancy, around 85 to 86 years, has produced one of the oldest median ages of any country in the world.
What is San Marino’s median age?
Approximately 49 to 50 years, ranking third highest globally among all countries tracked.
Is San Marino’s population growing or shrinking?
It has turned slightly negative in recent years, at approximately -0.7 percent, driven by both low natural increase and modest outward migration.
What is the largest ethnic group in San Marino?
Sammarinese nationals form the majority, alongside a substantial Italian minority reflecting the republic’s close integration with surrounding Italy.
What religion is most common in San Marino?
Roman Catholicism, claimed by over 90 percent of the population.
What language is spoken in San Marino?
Italian is the sole language used in daily life, government, and education.
Why is San Marino called the world’s oldest republic?
According to tradition, it was founded in the year 301 by a Christian stonemason named Marinus, making it the oldest continuously surviving republic in the world.
What is San Marino’s fertility rate?
Approximately 1.15 to 1.54 children per woman depending on the year, among the lowest recorded in Europe.
Will San Marino’s population keep aging?
Yes, UN projections suggest the median age could climb to around 51.8 years by 2050, with no clear reversal point given how entrenched low fertility has become.
Sources
- United Nations World Population Prospects 2024
- CIA World Factbook
- World Bank
- Istituto di Stato per la Previdenza Sociale San Marino