Although the largest Facebook.com markets by audience size are the United States, Germany and India, many of the most highly penetrated markets for the social networking giant are in Latin America, according to comScore's The Rise of Social Networking in Latin America Report. In fact, five of the top ten markets for Facebook.com penetration are in the region. 

Facebook.com reached 90.9% of all online users in Chile, ranking as the third most highly penetrated market globally behind the Philippines and Turkey.  Argentina, Colombia and Peru immediately followed Chile, with all markets seeing Facebook.com reach more than 89% of their internet populations, while the site reached 86.9% of online users in Venezuela.

Top ten markets for Facebook.com by percentage reach of visitors, June 2011:
1. Philippines: 93.5%
2. Turkey: 92.5%
3. Chile: 90.0%
4. Argentina: 89.9%
5. Colombia: 89.5%
6. Peru: 89.3%
7. Israel: 88.6%
8. Malaysia: 88.2%
9. Venezuela: 86.9%
10. Indonesia: 86.7%