Revenue Region 9A – CABAMIRO (Cavite – Batangas – Mindoro – Romblon)
- RDO No. 35 – Romblon, Romblon
- RDO No. 37 – San Jose, Occidental Mindoro
- RDO No. 54A – Trece Martirez City, East Cavite
- RDO No. 54B – Bacoor City, West Cavite
- RDO No. 58 – Batangas City, West Batangas
- RDO No. 59 – Lipa City, East Batangas
- RDO No. 63 – Calapan City, Oriental Mindoro
Revenue Region 9B – LAQUEMAR (Laguna – Quezon – Marinduque)
- RDO No. 55 – San Pablo City
- RDO No. 56 – Calamba City, Central Laguna
- RDO No. 57 – Binan City, West Laguna
- RDO No. 60 – Lucena City
- RDO No. 61 – Gumaca, South Quezon
- RDO No. 62 – Boac, Marinduque