Pia
- 614 Pia
- Baroudeurs de Pia XIII
- Casina Pio IV
- General Wayne A. Downing Peoria International Airport
- Namahana Piʻia
- PIA F.C.
- PIA Model Secondary School
- PIA Planetarium (disambiguation)
- PIA Township
- PIAS (disambiguation)
- PIIA
- Pacific Island Aviation
- Pakistan International Airlines
- Papers from the Institute of Archaeology
- Pasteur Institute of Algeria
- Pearson International Airport
- Penang International Airport
- Peripheral Interface Adapter
- Personal Information Agent
- Personal Insolvency Arrangement
- Peruvian International Airways
- Petersburg Indian Association
- Philippine Information Agency
- Pia (band)
- Pia (given name)
- Pia (horse)
- Pia (surname)
- Pia Carry
- Pia Film Festival
- Pia Pounds
- Pia Ravenna
- Pia mater
- Pia, Iran
- Pia, Pyrénées-Orientales
- Piia
- Pittsburgh Institute of Aeronautics
- Piá (footballer, born 1973)
- Piá (footballer, born 1982)
- Planning Institute Australia
- Plattsburgh International Airport
- Porta Pia
- Post-indictment arraignment
- Primary Insurance Amount
- Princeton in Asia
- Printing Industries of America
- Privacy Impact Assessment
- Private Internet Access
- Procurement Integrity Act
- Proprietary information agreement
- Proto-Indo-Aryan language
- Puntland Intelligence Agency
- Purified isophthalic acid
- Tacca leontopetaloides