PGI is an acronym that stands for:
- Planning Group International, see Sapient
- Protected Geographical Indication, see Appellation # Protected Geographical Indication (PGI, Eng. PGI )
- Pressure Gas Injection, see gas engine # Operation
- Phosphoglucose isomerase, see glucose - 6-phosphate isomerase
- The IATA code of the international airport Chitato ( Dundo ), Angola
- A brand of Premiere Global Services, Inc.