Core could refer to a number of things, including:
- Abdominal core, the center of one's body
- Computer core, the central part of a computer on a space station or starship
- Core hatch, the entrance to the engineering core on Federation starships
- Core laborer, Malon workers on waste vessels
- Diboridium core, Cardassian technology
- Duodynetic field core, part of a mnemonic memory circuit
- Engineering core, part of 23rd century Federation starships
- Galactic core, the center of a galaxy
- Galorndon Core, a planet
- Memory core, the central memory of a computer
- Nullifier core, part of a Romulan warp engine
- Optronic data core, holodeck technology
- Para-magnetic core, a type of planetary core
- Planetary core, the center of a planet
- Reactor core, part of the power systems for Romulan bases
- Stellar core, the heart of a star
- Temporal core, a Krenim phase device
- Warp core, an integral part of a warp engine
- Warp core breach, a failure of a warp engine
- Warp core breach (beverage), a strong drink