6G or 6-G can refer to:
- IATA code for Air Wales
- Rhodamine 6G, a chemical compound and dye
- 6G-fructosyltransferase, an enzyme
- T-6G Texan, a model of North American T-6 Texan
- iPod (6G), a model of iPod Classic
- iPod nano 6g, a model of iPod Nano
- iPod touch 6g, a model of iPod Touch
- 6G Mobile, a Dutch telco
- Mitsubishi 6G engine; see Mitsubishi 6G7 engine
- 6G Era; see History of video game consoles (sixth generation)
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