Santo Antão South Regional Football Association (Portuguese: Associação Regional de Futebol de Santo Antão Sul, abbreviation: ARFSSA, not commonly as Associação Regional de Futebol de Zona Sul de Santo Antão, abbreviation: ARFZSSA) is a football (soccer) association covering the south and the west of the island of Santo Antão .
The association covers the entire municipality of Porto Novo.
It was founded in 2002 after the Santo Antão Island League was split into two.
The south zone would have its seat in Porto Novo, the island capital.
The association has nine registered clubs, the regional champion competes in the National Championships each season.