SNG may refer to:
- Synthetic natural gas, a manufactured gas similar to natural gas
- Satellite news gathering
- Siún Nic Gearailt, Irish newsreader
- Scriptable Network Graphics, a specialized markup language for expressing the contents of a Portable Network Graphics file in a text form; also a program by Eric S. Raymond to translate between these two formats.
- Single negative metamaterial, any material with either permittivity or permeability less than zero.
- Sit-and-go poker tournament
- Slovak National Gallery (Slovenská národná galéria)
- Social network game
- Société Nautique de Genève
- Commonwealth of Independent States (Sodruzhestvo Nezavisimykh Gosudarstv in transliterated Russian)
- Sustainable natural gas
- Sylloge Nummorum Graecorum