| Competition: | Campeonato Paulista Série A3 |
| Season: | 2019 |
| Winners: | Audax (1st title) |
| Matches: | 134 |
| Total Goals: | 309 |
| Attendance: | 89,797 |
| Average Attendance: | 675 |
| League Topscorer: | Matheus Marcondele Lucas Pajeú (11 goals) |
| Promoted: | Audax Monte Azul |
| Relegated: | Taboão da Serra São Carlos |
| Prevseason: | 2018 |
| Nextseason: | 2020 |
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.
The following teams have changed division since the 2018 season.
Promoted from Segunda Divisão
Relegated from Série A2
Promoted to Série A2
Relegated to Segunda Divisão
| Club | Location | Stadium | Capacity [1] | |
|---|---|---|---|---|
| Audax | Osasco | Prefeito José Liberatti | 12,158 | |
| Barretos | Barretos | Fortaleza | 9,710 | |
| Batatais | Batatais | Osvaldo Scatena | 7,040 | |
| Capivariano | Capivari | Arena Capivari | 15,406 | |
| Comercial | Ribeirão Preto | Palma Travassos | 18,277 | |
| Desportivo Brasil | Porto Feliz | Ernesto Rocco | 6,160 | |
| EC São Bernardo | São Bernardo do Campo | 1º de Maio | 12,578 | |
| Grêmio Osasco | Osasco | Prefeito José Liberatti | 12,158 | |
| Monte Azul | Monte Azul Paulista | Otacília Patrício Arroyo | 8,000 | |
| Noroeste | Bauru | Alfredo de Castilho | 15,420 | |
| Olímpia | Olímpia | Maria Tereza Breda | 6,912 | |
| Primavera | Indaiatuba | Ítalo Limongi | 6,914 | |
| Rio Preto | São José do Rio Preto | Anísio Haddad | 16,145 | |
| São Carlos | São Carlos | Prof. Luiz Augusto de Oliveira | 8,138 | |
| Taboão da Serra | Taboão da Serra | Vereador José Ferez | 6,111 | |
| Velo Clube | Rio Claro | Benitão | 10,317 |
| Rank | Player | Club | Goals | |
|---|---|---|---|---|
| 1 |  Matheus Marcondele | Audax | 11 | |
| Lucas Pajeú | Desportivo Brasil | |||
| 3 | Marreta | Audax | 9 | |
| Caio Vieira | Comercial | |||
| Marcelo Campanholo | Desportivo Brasil | |||
| 6 | Thauan | Olímpia | 8 |