Replicator may refer to:

• Replicator (evolution unit), the theoretical basic unit of evolution in the gene-centered view of evolution
• Replicator (self-replication), a component that facilitates self-replication
  • DNA replication, the process of producing two identical copies from one original DNA molecule
• Replicator (nanotechnology), a device to precisely position molecules to guide chemical reactions
• Clanking replicator, an artificial self-replicating system that relies on conventional large-scale technology and automation
• Replicator equation, a deterministic monotone non-linear and non-innovative game dynamic used in evolutionary game theory
• Replicator (cellular automaton), a pattern

• Replicator (United States military), a program created to build weapons and gear faster and more cheaply than typical

• Replicator (Stargate), a fictional species in the Stargate universe
• Replicator (Star Trek), a fictional technology in the Star Trek universe
• Replicator (band), a noise rock band from Oakland, California

• Replication (disambiguation)