I may be wrong, but I think that Venezuela is the largest spanish speaking country in south america.
Mexico
Mexico is the only Spanish-speaking country in North America proper. If Central America is included, Mexico still has the largest number of speakers with more than 100 million.
ArgentinaArgentina is the largest Spanish-speaking country in South America by area of land. Colombia is the largest Spanish-speaking country in South America by population.* Brazil is the largest country in South America both by area and population but Portuguese is the official language there.
Brazil, the largest country in South America, is a Portuguese speaking country.
Mexico has the largest Spanish-speaking population in the world.
The largest Spanish-speaking Latin American country by population is Mexico.
The United States has the fifth largest Spanish-speaking population in the world.
Mexico is the only Spanish-speaking country in North America.
The country with the largest Spanish-speaking population is Mexico.
Mexico is the largest Spanish speaking country.
Ecuador is a country in South America. It is a Spanish speaking country.