SGP
- Reformed Political Party
- Savannah Ghost Pirates
- Schweizer SGP 1-1
- Scottish Green Party
- Secret Garden Party
- Shay Gap Airport
- Simmering-Graz-Pauker
- Simplified General Perturbations model
- Singapore
- Singpho dialect
- Social Golfer Problem
- Socialist Equality Party (Germany)
- Sociedad de Gestión de Productores Fonográficos del Paraguay
- Society of General Physiologists
- SpaceGhostPurrp
- Speedway Grand Prix
- Stability and Growth Pact
- Stockland Corporation Limited
- Subaru Global Platform
- Symposium on Geometry Processing