Rocker or rockers may refer to:
- Rocker, a British drummer, formerly of The Flatmates
- Fermin Rocker (1907–2004), painter and illustrator
- John Rocker (born 1974), American Major League Baseball pitcher
- Kumar Rocker (born 1999), American Major League Baseball pitcher
- Lee Rocker (born 1961), stage name of American rockabilly musician Leon Drucker
- Rudolf Rocker (1873–1958), German writer, historian and prominent anarchist
- Tracy Rocker (born 1966), American college football coach and former player
- Rocker (subculture), a British biker subculture that originated in the 1950s/1960s, also known as "Ton Up Boy" and "Greaser"
- Rocker, a generic term for outlaw motorcycle club style motorcyclists in Germany
- Rocker, the top and bottom parts of a "backpatch" or "colors" often worn by a member of a motorcycle club
- Rockers Motor Club, a now-defunct outlaw biker gang and support club for the Hells Angels
- Rocker (laboratory), a device used for mixing applications
- Rocker, a cradle mechanism formerly used in placer mining
- Rocker, a metal tool with small teeth used in mezzotint printmaking
- Rocker, the rise or curve of a vessel's hull along its keel line (for example in a kayak)
- Rocker, a rocking chair or one of the curved bands which support it
- Rocker arm, part of a 4-stroke engine
- Rocker panel, the body section of a vehicle below the door openings
- Rocker switch for switching between two states of an electrical device