Im not Jewish but i did write an essay on the Jewish community in Argentina for my Jewish Life and Thought class! Here is some info:
Argentina’s Jewish community numbers more than 250,000; of that 200,000 live in Buenos Aires, 20,000 in Rosario, 9,000 in Cordoba and 20,000 in other small, rural communities, including some areas in the Sante Fe province. There are also signifcant numbers of Jews in the cities of Concordia, La Plata, and Mar del Plata. The majority of these Jews are Ashkenazi, about 15 percent are Sephardic. Nearly all the Jews speak Spanish — Ladino and Yiddish are rarely spoken.
Argentina’s Jews have numerous Jewish community organizations. The DAIA (Delegacion de Asociaciones Israelitas Argentinas) was founded in 1939 as the political arm of the Jewish community. The DAIA protects Jewish rights and represents the community in the government. Another organization, the AMIA, originally an Ashkenazic mutual-aid society that provided health and human services to Argentina’s Ashkenazi population, now serves the country's entire Jewish community.
Most of Argentina’s synagogues are traditional, lying somewhere between Conservative and Orthodox. Buenos Aires has 50 Orthodox synagogues, 21 Conservative synagogues and a few Reform synagogues. Most of the synagogues built before World War II are still in use today.