Hammerhead
Hammerhead may refer to:

The head of a hammer

Commercial
Hammerhead (company), a subsidiary of SRAM Corporation

Fiction
Hammerhead (comics), a Marvel Comics foe of Spider-Man
Hammerhead (film), a 1968 film based on the novel by James Mayo
Hammerhead: Shark Frenzy a 2005 TV movie starring William Forsythe, Jeffery Combs and Hunter Tylo
Hammerhead (1987 film), a 1987 Italian action film directed by Enzo G. Castellari
Hammerhead (novel), a 1964 Charles Hood secret agent novel by James Mayo
Hammerhead Hannigan, the leader of Taurus Bulba's henchmen in the television cartoon series Darkwing Duck
Hammerhead, a Rulon character from the TV cartoon Dino-Riders
Hammerhead, the nickname for the Star Wars character Momaw Nadon
Hammerheads, a 1990 book by Dale Brown
The  Hammerhead, an alien species living on Pandora in James Cameron's science-fiction film Avatar
James Bond 007: Hammerhead, a 2016 James Bond comic book by Dynamite Entertainment

Games and rides
Hammerhead, a heavy helicopter gunship in the video game Command & Conquer 3: Kane's Wrath
Hammer Heads, a 2006 computer game from Pop Cap Games
Hammerhead (attraction), a former ride at Knott's Berry Farm, now defunct
Hammerhead, a monster truck present in various titles of the Twisted Metal series of video games
Hammerhead, the most prominent gas station and repair shop in the game Final Fantasy XV

Music
Hammerhead (band), noise rock band
"Hammerhead" (Jeff Beck song), 2010
Hammerhead (EP), a 2006 EP by Solace, or the title track
"Hammerhead" (The Offspring song), 2008
"Hammerhead" (Tin Machine song), from the 1991 album Tin Machine II
"Hammerhead" (James Reyne song), 1987
"Hammerhead", a song from the John Zorn album Naked City
"Hammerhead", an instrumental by Pat Travers from the album Heat in the Street
"Hammerhead", from the 1986 album Doomsday for the Deceiver, by Flotsam & Jetsam
"Hammerhead", a song by !!! from !!!, 2000

Science and technology
Hammerhead shark (genus Sphyrna), of which there are nine known species
Hammerkop (Scopus umbretta), a bird of order Ciconiiformes, may also be known as a hammerhead
Hammerhead ribozyme, which can catalyze the sequence-specific cleavage of RNA phosphodiester bonds
Hammerhead crane, a type of crane
Hammerhead worm
Google Nexus 5, an Android handset with the code name Hammerhead

Sports
Jupiter Hammerheads, a minor league baseball team based in Jupiter, Florida
Wilmington Hammerheads FC, a minor league soccer team based in Wilmington, North Carolina
Corpus Christi Hammerheads, a professional arena football team
Hammerhead turn or stall turn, an aerobatic maneuver
Hammerhead (mascot), mascot of the British football club West Ham United

United States Navy submarines
USS Hammerhead (SS-364), a Gato-class submarine, commissioned in 1944
USS Hammerhead (SSN-663), a Sturgeon-class submarine, commissioned in 1968 and struck in 1995