People
Nationality: Noun and adjective--Guinean(s).
Population (est. 2001): 1.3 million.
Annual growth rate (est. 2001): 2.23%.
Ethnic groups: Balanta 30%, Fula 20%, Manjaca 14%, Mandinka 13%, Papel 7%.
Religions: Indigenous beliefs 50%, Muslim 45%, Christian 5%.
Languages: Portuguese (official), Creole, French, many indigenous languages, including Mandinka and Fula.
Education: Years compulsory--4. Literacy--34% of adults. Health: Infant mortality rate--130/1,000. Life expectancy--44 years.
Work force (480,000): Agriculture--78%; industry, services, and commerce--14%; government--8%.

People of Guinea-Bissau
The population of Guinea-Bissau is ethnically diverse with distinct languages, customs, and social structures. Most people are farmers, with traditional religious beliefs (animism); 45% are Muslim, principally Fula and Mandinka-speaker concentrated in the north and northeast. Other important groups are the Balanta and Papel, living in the southern coastal regions, and the Manjaco and Mancanha, occupying the central and northern coastal areas.
source: http://www.state.gov