At the airport in Buenos Aires, cheering crowds greeted Argentina, and Tuesday has been designated a national holiday.
The team, which won the final on Sunday by defeating France, arrived at their destination at 05:24 GMT on Tuesday.
As they rode an open-top bus to the headquarters of their Football Association, supporters lined the streets.
Tuesday at noon (5:00 GMT), the main ceremony will take place at the Obelisk monument in the capital city.
The day will be a bank holiday, according to the Argentine government, so supporters “can express their deepest joy for the national team.”
The team was led off of the aircraft by Lionel Messi.