| 1991 PBA All-Filipino Conference | |
|---|---|
| Duration | June 9 - September 1, 1991 | 
| TV partner(s) | Vintage Sports (PTV) | 
| Finals | |
| Champions | Purefoods TJ Hotdogs | 
| Runners-up | Diet Sarsi Sizzlers | 
| PBA All-Filipino Conference chronology | |
| PBA conference chronology | |
| Qualified for semifinals | 
| Qualified for finals | |
| Qualified for finals playoff | |
| Qualified for battle-for-third | 
The 1991 Philippine Basketball Association (PBA) All-Filipino Conference was the second conference of the 1991 PBA season. It started on June 9 and ended on September 1, 1991. The tournament is an All-Filipino format, which doesn't require an import or a pure-foreign player for each team.
The following format will be observed for the duration of the conference:
Group A:
Group B: