Facebook reached over 43.5 million in Africa and 1.1 billion world wide as of May 2, 2013.
According to the information from Wikipedia, the following countries are
top ten Facebook users in Africa
and shows their rank in the world.
.
Population: 87302819
Internet Users: 960331
Facebook Users: 902440
% Internet Users: 1.1%
World Rank: 87
9. Democratic Republic of Cogo
Population: 73599190
Internet Users: 915400
Facebook Users: 903020
% Internet Users: 1.24%
World Rank: 86
8. Ghana
Population: 25292392
Internet Users: 3568757
Facebook Users: 1630420
% Internet Users: 14.11%
World Rank: 70
7. Kenya
Population: 43013341
Internet Users: 12043735
Facebook Users: 2045900
% Internet Users: 28%
World Rank: 64
6. Tunisia