Crommelin may refer to:
- People
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- Andrew Claude de la Cherois Crommelin, astronomer
- Daniel Crommelin Verplanck, U.S. politician
- John G. Crommelin, U.S. Navy officer
- May Crommelin, writer
- Timothy John Crommelin Eggar, British politician
- Craters named Crommelin
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- Crommelin (lunar crater)
- Crommelin (Martian crater)
- Comet named Crommelin
-
- 27P/Crommelin
- Military Ship
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- USS Crommelin