The first inhabitants of the region were Guarani Indians who were established in the islands and the Querandí Indians who were nomads who lived off of hunting and fishing.
Mixing with the Spanish who arrived in these lands, the “criollo” was born.
With time, the population of Buenos Aires acquired a different personality thanks to the different waves of immigration that began to arrive after 1880. There was a massive arrival of Spanish, Italian, Lebanese, Polish and Russian immigrants who came in search of “bread and work” which corresponded to the state slogan of “populate Argentina.”
And from the start of the 20th century, there was another wave of immigration from other Latin American countries and Asian countries (especially China and Korea) in addition to internal migration from the interior of the country. Each of these groups donated a part of itself to the identity of “porteño” that we know today.