Zircon is a mineral and gemstone.
Zircon may also refer to:
Science and technology Zircon (microkernel), the microkernel of the operating system Google Fuchsia Cubic zirconia, a synthetic diamond substitute, sometimes mistakenly referred to as "zircon"
Military Zircon (satellite), a British signals intelligence satellite Zircon affair, an incident surrounding the British signals intelligence satellite USS Zircon, a US Navy vessel 3M22 Zircon, Russian hypersonic anti-ship cruise missile
Other uses Zircon (composer), American electronic musician Andrew Aversa Zircon, a character of the Sailor Moon manga series Zircon, multiple fictional characters from the animated children's television show Steven Universe Zircon, a character in Land of the Lustrous.