OGN or Ogn may refer to:
- Original graphic novel
- Oregon Geographic Names
- OGN (TV channel)
- OGN (gene) (also called mimecan)
- Offshore Group Newcastle, or OGN Group, who make oil rigs on the River Tyne in Newcastle upon Tyne
- Ognøya
- IATA airport code of Yonaguni Airport
- ICAO airline code of Origin Pacific Airways
- Open Glider Network