San Antonio is a city in the north-eastern region of Misiones Province, Argentina, and the capital of the General Manuel Belgrano Department.

It lies on the Brazilian border at 26°3′S 53°43′W / 26.050°S 53.717°W / -26.050; -53.717.

Its population was 3,665 at the 2010 census (INDEC).

The municipality contains part of the 84,000 hectares (210,000 acres) Urugua-í Provincial Park, created in 1990.

[2] This article about a place in Misiones Province, Argentina is a stub.