There are 21 Spanish-speaking countries in the world, where Spanish is either the official language or an important language. Here is a list of these countries, sorted by the number of native Spanish speakers:

1. Mexico
2. Colombia
3. Spain
4. Argentina
5. Peru
6. Venezuela
7. Chile
8. Ecuador
9. Guatemala
10. Cuba
11. Bolivia
12. Dominican Republic
13. Honduras
14. Paraguay
15. El Salvador
16. Nicaragua
17. Costa Rica
18. Puerto Rico
19. Panama
20. Uruguay
21. Equatorial Guinea

It is worth noting that Spanish is also commonly spoken in the United States, where over 60 million people identified as being of Hispanic origin in the 2019 census, comprising more than 18% of the country’s population.