Guichen may refer to the following:
People
- Luc Urbain de Bouëxic, comte de Guichen, a French naval officer
Places
Australia
- Guichen Bay, a bay in South Australia
- Guichen Bay Conservation Park, a protected area in South Australia
France
- Guichen, a commune in northwestern France
- Canton of Guichen, a canton in northwestern France
Ships
- French ship Guichen, two ships of the French navy.
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