may refer to:
- Hum (sound) , a sound produced with closed lips, or by machinery, insects, or other periodic motion
- The Hum , a phenomenon involving a persistent and invasive low-frequency noise of unknown origin
- Hum (band) , a U.S. space-rock band
- Hum, Croatia , known as the smallest town in the world
- Hum (film) , a 1991 Bollywood film starring Amitabh Bachchan
- Mains Hum , an electric or electromagnetic phenomenon that causes a low frequency (50 or 60 Hz) audiable signal
- Hum Mountain , a mountain in Serbia
- Land of Hum, an English translation of the Zahumlje region of modern Herzegovina
- Hum, a possible transliteration of the sixth syllable in Buddhist "Six syllable mantra" Om Mani Padme Hum
- Hum., an abbreviation for Humanities
- HUM, Harakat Ul-Mujahidin , an Islamic militant group based in Pakistan
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