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French Guiana counts 318,872 residents as of 2026. That is a 14-fold increase on the 23,396 recorded in 1950. It is expanding at +1.65% a year, adding about 5.2K people a year. With only 4 people/km², it is one of the world's more sparsely settled countries. Half the population is younger than 24.9 years, and the age structure is steadily tilting older: the median is projected to reach 28.6 by 2050. Women outnumber men, at 93 males per 100 females. By 2100, UN projections put it at 775,239, up +143% from 2026.
Total population
318,872
Density
4 people/km²
Median age
24.9 years
Growth rate
+1.65%
French Guiana is experiencing rapid population growth, adding thousands of people each year. The sex ratio of 93 males per 100 females is notably lower than the global average of ~101. The population is gradually aging, with median age projected to reach 29 by 2050 (up from 25 in 2026). Population density is low at 4 people per km². Looking ahead, UN projections show the population reaching 775.2K by 2100, more than double 2026's level.