Cetus (disambiguation)

Cetus can refer to:
 * The constellation Cetus
 * The former biotechnology company Cetus Corporation
 * Project Cetus, crewless submarine being developed by the United Kingdom
 * Cetus (mythology), the monster sent to devour Andromeda which was slain by Perseus
 * "-cetus", a suffix used to describe whales in taxonomy.
 * Cetus, a settlement on Earth in the online game Warframe that hosts the Ostrons, a civilization of human traders