Moly may refer to:
- Moly (herb), a magic herb in Greek mythology
- Allium moly, a flowering plant
- Molybdenum (Mo), a chemical element
- Molybdenum disulfide (), referred to as "moly" when used as a dry lubricant, or added to grease or oil
See also
- Chromoly, a steel chromium and molybdenum alloy
- Moli (disambiguation)
- Molly (disambiguation)