2019 Campeonato Paulista Série A3

The 2019 Campeonato Paulista Série A3 was the 27th season of the third level of the São Paulo state league under its current title and the 66th season overall.

Team changes
The following teams have changed division since the 2018 season.

To Série A3
Promoted from Segunda Divisão
 * Primavera
 * Comercial

Relegated from Série A2
 * Audax
 * Batatais

From Série A3
Promoted to Série A2
 * Atibaia
 * Portuguesa Santista

Relegated to Segunda Divisão
 * Rio Branco
 * Marília
 * União Barbarense
 * Manthiqueira
 * Matonense
 * Mogi Mirim