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San Marino's population has slipped past its peak: from a high of 34,769 in 2020, it stands at 33,605 in 2026. That is a 2.6-fold increase on the 12,947 recorded in 1950. It is growing modestly, at +0.09% a year. People are packed in tightly, at 551 people/km², among the most crowded places on Earth. Half the population is younger than 49.1 years, and the age structure is steadily tilting older: the median is projected to reach 50.8 by 2050. Women outnumber men, at 97 males per 100 females. By 2100, UN projections see it falling to 31,165 (-7% from 2026).
Total population
33,605
Density
551 people/km²
Median age
49.1 years
Growth rate
+0.09%
San Marino passed its population peak 6 years ago in 2020, and has since declined by 3.3%. The population is gradually aging, with median age projected to reach 51 by 2050 (up from 49 in 2026). Population density is high at 551 people per km².