People
Nationality: Noun and adjective--Comorian(s).
Population (2001 est.): 596,202. Mayotte (1990 est.)--70,000.
Annual growth rate (2001 est.): 3.02%.
Ethnic groups: Antalote, Cafre, Makoa, Oimatsaha, Sakalava.
Religions: Sunni Muslim 98%, Roman Catholic 2%.
Languages: Shikomoro (a Swahili-Arab), Arabic, French.
Education: Attendance--60% primary, 34% secondary. Literacy--57.3%.
Health: Life expectancy--60 yrs. Infant mortality rate--84.07/1,000.
Work force (1996): 144,500. Agriculture--80%.

Comoros People
The Comorians inhabiting Grande Comore, Anjouan, and Moheli (86% of the population) share African-Arab origins. Islam is the dominant religion, and Koranic schools for children reinforce its influence. Although Arab culture is firmly established throughout the archipelago, a substantial minority of the citizens of Mayotte (the Mahorais) are Catholic and have been strongly influenced by French culture.

The most common language is Shikomoro, a Swahili dialect. French and Arabic also are spoken. About 57% of the population is literate.
source: http://www.state.gov