Ion (network), a defunct communications network formerly pushed by Sprint

In physics and chemistry, an ion is an atom or group of atoms with a net electric charge. Ion may also refer to:

ION Television

Ion thruster, a type of propulsion system for space ships and satellites

Instituto Oncologico Nacional, or National Oncologic Institute, a specialized hospital in Panama City for cancer treatment.

Saturn ION, an automobile sold by General Motors.

Ion (dialogue), a dialogue by Plato, between Socrates and Ion, a reciter of epic poems.

Ion (window manager), in computing, a window manager for the X Window System.

Ion (play), a play by Euripides on the relationship between humans and the gods, in which Ion is instead the son of Apollo.

Institute of Navigation, a non-profit professional society dedicated to the advancement of the art and science of navigation.

Ion (Marvel Comics), the super villain of Marvel Comics.

Ion (mythology), also called Ionas, the son of Xuthus and Creüsa, daughter of Erechtheus.

Ion of Chios, a writer and philosopher.

ION (chocolate), a Greek chocolate brand.

Alesis Ion, an analog-modeling synthesizer keyboard made by Alesis.

Ion (comics), a fictional symbiotic creature in the DC Comics universe.

Ion (paintball marker), the Paintball marker from Smart Parts.

Ion (name), the Romanian equivalent of John