North America:
* Mexico
* United States (Spanish is an official language in the U.S. territory of Puerto Rico)
Central America:
* Belize (English is the official language, but Spanish is widely spoken)
* Costa Rica
* El Salvador
* Guatemala
* Honduras
* Nicaragua
* Panama
South America:
* Argentina
* Bolivia
* Chile
* Colombia
* Ecuador
* Paraguay
* Peru
* Uruguay
* Venezuela
Europe:
* Andorra (Catalan is the official language, but Spanish is also widely spoken)
* Spain (Spanish is the official language)
Africa:
* Equatorial Guinea
Oceania:
* None
Other:
* American Samoa (English is the official language, but Spanish is spoken by some residents)
* Guam (English is the official language, but Spanish is spoken by some residents)
* Northern Mariana Islands (English is the official language, but Spanish is spoken by some residents)
It's important to note that Spanish is spoken by a significant minority population in many other countries around the world.