PSG may refer to:
Firearms:
- Prickskyttegevär, Swedish for sniper rifle, see PSG-90
- Präzisions-Scharfschützen-Gewehr, a German sniper rifle based on the H&K G3 design, see PSG-1
Places:
- Petersburg James A. Johnson Airport, Alaska, which has the three letter IATA code PSG
- Princes Street Gardens Edinburgh, Scotland
Groups/Organizations:
- Pacific Seabird Group
- Pagan Spirit Gathering
- Guianese Socialist Party
- Partei für Soziale Gleichheit
- Patti Smith Group, a band
- Peru Support Group, a UK-based advocacy organisation
- PSG College of Technology, an engineering college in Coimbatore, Tamil Nadu, India
- Presidential Security Group
Sports:
- Paris Saint-Germain F.C., an association football club
- Paris Saint-Germain F.C. (Ladies), a women's association football club
- Paris Saint-Germain Rugby League, a now-defunct rugby league club
Things and Concepts:
- Phosphosilicate glass
- Phrase structure grammar
- Polysomnography
- Programmable Sound Generator
- Problem-Solving Group
Other:
- Platoon Sergeant
- Panty & Stocking with Garterbelt