PG may refer to:
- Parental Guidance, a rating in various motion picture rating systems
- MPAA Rated PG
- Page (paper)
- Parti de gauche, a socialist political party in France
- Podgorica car plates
- Bangkok Airways' IATA airline designator
- Patrologia Graeca, a collection of writings by the Christian Church Fathers
- Peapack-Gladstone, New Jersey
- Peptidoglycan
- petagram (Pg) or picogram (pg), SI units of mass based on the kilogram
- PG Tips, a brand of tea
- pg (Unix), a Unix system command
- Phosphatidylglycerol, glycerophospholipid
- 2-Phosphoglycerate and 3-Phosphoglycerate, glycolysis intermediates
- Point Gamma, the biggest student party in France
- Point guard, one of the five positions in basketball
- Postgraduate
- Power Girl
- Prince George's County, Maryland
- Procter & Gamble, a consumer goods company
- Prostaglandin, a hormone
- Proteoglycan
- Papua New Guinea's ISO 3166-1 country code
- Spratly Islands's FIPS PUB 10-4 territory code
- Project Gutenberg
- Paleogene Period
- P.G. Sittenfeld, a member of the City Council of Cincinnati
- Propylene glycol