Only Cuba holds that distinction.
Cuba is such country.
Cuba was the country that saw a successful communist revolution in the 1950's.
Nicaragua
Peru isn't communist...
Cuba is a Latin American country that is governed by a communist regime, with the Communist Party of Cuba being the only legal political party.
Costa Rica is a country in Latin America
No, there may be some countries where the leader tends to be socialist, but out and out communism there is no country in South America with this system.
Cuba
south america is neither a communist nor a country
Cuba qualifies as such.
Fidel Castro (Cuba)