What Spanish speaking country belongs to US?

There is no Spanish-speaking country that belongs to the United States. The United States does not have any territories that are Spanish-speaking countries.

The United States does have several territories, but they are not independent countries:

* Puerto Rico: A U.S. territory with a Spanish-speaking population.

* U.S. Virgin Islands: A U.S. territory with a Spanish-speaking population.

* Guam: A U.S. territory with a predominantly English-speaking population.

* American Samoa: A U.S. territory with a Polynesian language as the primary language.

Let me know if you have any other questions!