Hosnian could refer to:
- The Hosnian sector, a sector.
- The Hosnian system, located in the Core Worlds;
- Hosnian, a planet within the aforementioned system;
- Hosnian Prime, another planet within the aforementioned system;
- The Hosnian Cataclysm, in which the entire Hosnian system was destroyed.
- Hosnia, a planet in the Mid Rim Territories.
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