San Antonio is a corregimiento (township) located in Atalaya District within Veraguas Province, Panama. According to the 2010 census, it had a population of 2,966 residents, having grown from 2,125 in 2000.
The corregimiento was officially established through Law 58, enacted on July 29, 1998. Its creation followed the constitutional invalidation of Law 1 of 1982, which had previously governed the administrative division of the area.