Onset may refer to:
Music Onset (audio), the beginning of a musical note or sound Interonset interval, a term in music
Phonetics and phonology Syllable onset, a term in phonetics and phonology
Other uses Onset, Massachusetts, village in the United States Onset Island (Massachusetts), a small island located at the western end of the Cape Cod Canal The Onset, Liverpool indie rock group formed by Mike Badger of the La's The Onset (album), a 2005 album by the band , a United States Navy patrol boat in commission from 1917 to 1918 "Onset", a 2019 song by Haiku Hands
See also Offset (disambiguation)