SMG
- IWAS World Games
- Macao Meteorological and Geophysical Bureau
- OpenVMS
- Outright Scotland
- SGM Light
- SMG (property management)
- SMG Studio
- SMGS (disambiguation)
- STV Group plc
- Santa Maria Airport (Peru)
- Santa Monica 13
- Sarah Michelle Gellar
- Scandinavian Music Group
- Science Museum Group
- Seoul Metropolitan Government
- Sex Machineguns
- Shanghai Media Group
- Sister Machine Gun
- Sony Music Group
- South Morang railway station
- Southall Monitoring Group
- Spaceflight Meteorology Group
- St Margarets railway station (London)
- Starcom Mediavest Group
- Submachine gun
- Sumang LRT station
- Super Mario Galaxy
- Supermassive Games
- Suzuki Motor Gujarat
- Under-Secretary-General of the United Nations