Governor’s Office- Vice Governor’s Office
- Provincial Administrator’s Office
- Provincial Legal Office (PLO)
- Provincial Information Office (PIO)
- Provincial Treasurer Office (PTO)
- Office of the Provincial Accountant
- Provincial Budget Office (PBO)
- Provincial Planning and Development Office (PPDO)
- Provincial Internal Audit and Control Office (PIACO)
- Provincial Human Resource Management Office (PHRMO)
- Provincial General Services Office (PGSO)
- Provincial Engineering Office (OPE)
- Provincial Assessor’s Office
- Provincial Agriculturist Office (OPA)
- Provincial Veterinarian Office (PVET)
- Provincial Social Welfare and Development Office (PSWDO)
- Provincial Disaster Risk Reduction and Management Council (PDRRMC)
- Provincial Cooperative Livelihood, Enterprises and Dev’t Office (PCLEDO)
- Isabela Tourism Office
- Environment and Natural Resources Office (ENRO)
- Provincial Public Safety Office (PSO)
- Public Employment Service Office (PESO)
- Compound Maintenance Office (CMO)
- Provincial Economic Development and Investment Promotion Office (PEDIPO)
- Integrated Provincial Health Office (IPHO)
- Integrated Provincial Health Office–Field Health Service (IPHO-FHS)
- Gov. Faustino Dy, Sr. Memorial Hospital (GFNDYMH)
- Manuel A. Roxas District Hospital (MARDH)
- Milagros Albano District Hospital (MADH)
- Cauayan District Hospital (CDH)
- Echague District Hospital (EDH)
- San Mariano Community Hospital (SMCH)
- Palanan Station Hospital (PSH)
- Isabela School for the Blind (ISB)
- Isabela School for the Deaf Center (ISDC)
- BRO Office
- Agricultural & Biosystems Engineering Division (ABED)
- Isabela Provincial Jail
- Provincial Youth Development Office (PYDO)
- Isabela Coastal Development Office (ICDO)
- MASA MASID
- Office of the Secretary to the Sangguniang Panlalawigan
- Management Information System (MIS)
- Provincial Project Management Implementing Unit (PPMIU)
- Provincial Model Daycare Center
- Women and Children Protection Center
- Lingap Center
- Halfway Home
- Museum & Library
Governor’s Office
Provincial Legal Office (PLO)
Provincial Information Office (PIO)
Provincial Disaster Risk Reduction and Management Council (PDRRMC)
Provincial Cooperative Livelihood, Enterprises and Dev’t Office (PCLEDO)
Isabela Tourism Office
Environment and Natural Resources Office (ENRO)
Provincial Public Safety Office (PSO)
Public Employment Service Office (PESO)
Echague District Hospital (EDH)
Palanan Station Hospital (PSH)
MASA MASID