A foghorn is a navigation aid at sea.
Foghorn may also refer to:
"The Fog Horn", a 1951 science-fiction short story by Ray Bradbury "The Foghorn", a 1933 semi-horrific short story by Gertrude Atherton Foghorn Leghorn, a cartoon rooster that appears in the Looney Tunes and Merrie Melodies series Foghorn (film), a 1952 Japanese drama film "Foghorn", song by the band A from their 1997 album How Ace Are Buildings