1. Monaco - 44,000 people per square mile
2. Singapore - 18,652
3. Malta - 3,278
4. Bahrain - 2,793
5. Bangladesh - 2,637
6. Maldives - 2,573
7. Barbados - 1,626
8. Mauritius - 1,592
9. Nauru - 1,529
10. San Marino - 1,338
By Matt Rosenberg, About.com
1. Monaco - 44,000 people per square mile
2. Singapore - 18,652
3. Malta - 3,278
4. Bahrain - 2,793
5. Bangladesh - 2,637
6. Maldives - 2,573
7. Barbados - 1,626
8. Mauritius - 1,592
9. Nauru - 1,529
10. San Marino - 1,338
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