• Rocker (subculture), a British subculture based around motorcycles
• Rocker, a person who listens to or makes rock and roll or rock music
• Rocker turn, in figure skating
• Rocker, a type of furniture, such as a chair or cradle with curved pieces on the bottom, to provide a back and forth motion when pushed or pulled (see rocking chair)
• Rocker, a type of cradle used for washing sand or gravel to expose heavier metals, such as gold or silver, used in placer mining

Rocker is also the name of:

• Rudolf Rocker (1873–1958), German writer, historian and prominent figure in the international Anarchist movement
• Fermin Rocker (1907–2004), painter and illustrator
• John Rocker (born 1974), former American Major League Baseball relief pitcher
• Lee Rocker (born 1961), rockabilly double bass player who started his career with "The Stray Cats"
• Tracy Rocker (born 1966), American college football coach and former player
• Rocker, former drummer of the British indie band The Flatmates

In music:

• "The Rocker", a song by Thin Lizzy from their 1973 album Vagabonds of the Western World
• "The Rocker", a song by Raven from their 1994 album Glow
• Rocker (album), a 2002 album by Kraljevski Apartman
• "Rocker", a 2004 single from Alter Ego
• "Rocker" (song), by AC/DC
• "Rocker", a song from The 69 Eyes ninth studio album Angels, as well as third single
• "Rocker", a song by Miles Davis on Birth of the Cool (1950)

In film:

• "The Rocker (film)", a 2008 film starring Rainn Wilson
• "Rocker (film)", a 1972 German film set in Hamburg by Klaus Lemke