L23 may refer to:
Vehicles
- Beechcraft L-23 Seminole, an American military utility aircraft
- HMS L23, submarine of the Royal Navy
- HMS Whitley (L23), a destroyer of the Royal Navy
- INS Gharial (L23), an amphibious warfare vessel of the Indian Navy
- LET L-23 Super Blaník, a Czechoslovakian glider
- Zeppelin LZ 66, an airship of the Imperial German Navy
Other uses
- 60S ribosomal protein L23
- Mitochondrial ribosomal protein L23
- Nissan L23 engine, an automobile engine
- Pahute Mesa Airstrip (FAA identifier L23)
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