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In 2026, Mayotte's population is projected at 347,536. That is a 17-fold increase on the 20,526 recorded in 1950. It is growing at 3.04% a year, one of the faster rates globally, adding about 10.6K people a year. People are packed in tightly, at 927 people/km², among the most crowded places on Earth. Half the population is younger than 17.3 years, and the age structure is steadily tilting older: the median is projected to reach 22.5 by 2050. Women outnumber men, at 92 males per 100 females. By 2100, UN projections see it rising to 1,375,551, up 296% from 2026.
Total population
347,536
Density
927 people/km²
Median age
17.3 years
Growth rate
+3.04%
Mayotte is experiencing rapid population growth, adding tens of thousands of people each year. The sex ratio of 92 males per 100 females is notably lower than the global average of ~101. In 2026, with a median age of 17, it is one of the world's youngest populations, though the median will rise to 23 by 2050. Population density is high at 927 people per km². Looking ahead, UN projections show the population reaching 1.4M by 2100, more than double 2026's level.