In Corsica, when trying to find out how many residents are of the Muslim faith, one hits a wall: French law prohibits any collection of religious data in censuses. No “religion” box on Insee forms, no religious register maintained by the state. The question “how many Muslims in Corsica” therefore requires an answer constructed by cross-referencing indicators, never by a direct count.
Why no official figures on Muslims in Corsica exist
French public statistics are based on a principle established by the 1978 law: prohibition of collecting religious affiliation in censuses and administrative files. Insee records nationalities, countries of birth, migration flows, but not beliefs.
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This legal constraint explains why all circulating estimates come from indirect methods. One extrapolates from the share of immigrants from predominantly Muslim countries, relies on occasional declarative surveys (such as the “Trajectories and Origins” survey), or cross-references data on attendance at places of worship.
For Corsica, one figure often comes up: 42,000 Muslims, cited by the local press. Cross-referencing this data with the number of Muslims in Corsica according to Quel Voyage, we find a similar order of magnitude, related to an island population of 360,200 inhabitants as of January 1, 2025, according to Insee. This would place the share of the Muslim population in Corsica at around one-tenth of the residents.
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This ratio remains an estimate. The data varies depending on whether or not one includes the descendants of immigrants born in France, naturalized individuals, or those who identify as Muslims without practicing.
North African immigration in Corsica: the main indirect indicator
Insee confirmed in 2024 that Corsica is the second French region for the share of immigrants, just behind Île-de-France. This immigration is primarily driven by arrivals from the Maghreb (Morocco, Tunisia, Algeria) and Italy, with a noticeable increase since the early 2000s.
When reasoning solely on immigrants in the Insee sense (people born foreign abroad), one underestimates the actually present population of Maghreb origin. A significant portion of these residents have acquired French nationality or were born in the territory to immigrant parents.
The trap of the “immigrant” category
Children born in Corsica to Moroccan or Algerian parents are French by birth if they meet the conditions of the right of soil. They disappear from “immigrant” counts while being able to identify as Muslims. The Trajectories and Origins survey by Insee indicated that nationally, 10% of 18-59 year-olds identified as Muslims in 2019-2020.
Applying this national rate to Corsica would be reductive. The island’s migratory structure, with an overrepresentation of flows from North Africa compared to the metropolitan average, suggests a potentially higher local proportion.
Muslim places of worship in Corsica: a concentrated geography
The Muslim presence on the island is also reflected in prayer rooms and mosques. Places of worship are mainly found in Ajaccio, Bastia, Porto-Vecchio, and in a few municipalities on the eastern coast. This geography follows the distribution of seasonal employment and economic basins.
- Prayer rooms are often associative premises, not buildings constructed as mosques, making them less visible in the urban landscape
- The capacity of these places remains modest compared to large continental cities, which sometimes necessitates organizing outdoor prayers during major religious holidays
- The absence of a large structuring mosque in Corsica distinguishes the island from most comparable metropolitan departments
This situation reflects a gap between the size of the Muslim community and the availability of worship infrastructure. Projects for building mosques have regularly sparked local debates, as in other French regions.
Perception and demographic reality: a documented gap in France
A survey by Ipsos conducted across 40 countries showed that French people estimated the share of Muslims at 31% of the population, while estimates place it between 7 and 10%. France exhibited the largest gap between perception and reality among all surveyed countries, with a 24-point discrepancy.
In Corsica, this phenomenon of overestimation combines with identity tensions specific to the island. The question of the number of Muslims takes on a political dimension here that is not found in the same terms in Brittany or Auvergne.
What national projections say for Corsica
Projections from the Pew Research Center estimate that the proportion of people of the Muslim faith in France could reach between 12 and 18% by 2050, depending on the migration scenarios considered. For Corsica, these national projections need to be nuanced.
- The Corsican migratory balance is the only driver of the island’s demographic growth, with births being lower than deaths since 2013
- Corsican fertility is the lowest in France at 1.19 children per woman in 2024, which alters the age pyramid more quickly than elsewhere
- Family transmission of religion is documented as being stronger in Muslim families than in other faiths, which impacts generational projections
Corsican demographics depend almost exclusively on who settles on the island. Any variation in migration flows directly alters the composition of the population, including in terms of faith.
In the absence of religious statistics, estimating the Muslim population in Corsica remains an exercise in approximation. The available orders of magnitude, around several tens of thousands of people, provide an indication, not a certainty. What is documented, however, is that Corsica concentrates one of the highest shares of immigrants in France and that this immigration primarily comes from predominantly Muslim countries. The rest relies on individual declaration, which no one in France has the right to count.