How many countries are in North America?

Answer:

Including all the islands, there are 23 countries in North America; however, if
one abides by most cartographer's defining extents of North America, there are 17. They are:

1. Canada
   
2. The United States of America
3. Mexico
4. Greenland
5. Iceland (straddles the plate boundary between North America and Europe)
   
6. Guatemala
7. Belize
8. Nicaragua
9. Honduras
10. El Salvador
11. Costa Rica
12. Panama
13. Cuba
14. Haiti
15. Jamaica
16. The Bahamas
17. The Dominican Republic

Greenland is not a country it is part of Denmark, and Iceland is in Europe.