Replicator may refer to various things related to replication and self-replication:
- The theoretical basic unit of evolution in some schools of evolutionary theory
- Replicator (nanotechnology)
- Clanking replicator
- DNA replication
- Replicator equation
- In culture:
- 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