# Omega (disambiguation)

Omega (Ω or ω) is the last letter of the Greek alphabet. Omega may also refer to:

## Arts, entertainment and media
### Fictional entities

* Omega (Doctor Who)
* Omega, a Maximum Ride character
* Omega, the fictional government agency in the film True Lies
* Omega, in the Mega Man Zero series
* E-123 Omega, a Sonic the Hedgehog character
* Omega, or Genra, a Dead or Alive character
* Omega 13, a time machine in the 1999 science fiction/comedy film Galaxy Quest
* Omega Ranger, a Power Rangers S.P.D. character
* Omega Rugal, a The King of Fighters character
* The Omegas, in the 2006 film X-Men: The Last Stand
* Omega, one of the main characters in the 2021 animated series Star Wars: The Bad Batch
* Omega OS, a fictional operating system in the 2018 game PC Building Simulator
* The Omega (Ninjago), a character in Ninjago
* Omega Flowey, a villain in the game Undertale
* Omega, the tier 100 skin of the Chapter 1, Season 4 Battle Pass in Fortnite: Battle Royale

### Film and television

* Omega (film), a 2008 Greek film
* "Omega" (Dollhouse), the 12th episode of the TV series Dollhouse
* "The Omega Directive", an episode of Star Trek: Voyager, involving a substance called "Omega"
* "Omega" (The Walking Dead), an episode of the television series The Walking Dead
* The Omega Man, 1971 American film

### Literature

* Omega (Harris novel), by Christine Harris, 2000
* Omega (McDevitt novel), Jack McDevitt, 2003
* Omega (Leonard novel), by Raymond Leonard, 1986
* Omega: The Last Days of the World, an 1894 science fiction novel by Camille Flammarion
* Omega the Unknown, an American comic book by Marvel Comics

### Music

* Omega (record label), a Dutch record label
* Omega (singer) (born 1979), a Dominican merengue singer
* Queen Omega (singer) (born 1981), a Trinidadian reggae singer
* Omega (band), a Hungarian rock band
* Omega and the Mechanical Animals, a moniker adopted by Marilyn Manson and his band

#### Albums

* Omega (Asia album), 2010
* Omega (Epica album), 2021
* Omega (Jelena Karleuša album), 2023
* Juggernaut: Omega, by Periphery, 2015, and a song on that album
* Omega, by Hound Dog, 2005
* Omega, by Azaghal, 2008
* Omega, by Enrique Morente, 1995
* Omega, by Immanuel Wilkins, 2020

#### Songs

* "Omega" (song), by Rosalía featuring Ralphie Choo, 2024
* "Ω", by BT from _, 2003
* "Omega", by Bruce Dickinson from Accident of Birth, 1997
* "Omega", Crystal Lake from True North, 2016
* "Omega", Rebecca St. James from Pray, 1998
* "Omega", by SZA from Z, 2014

### Other uses in arts, entertainment and media

* Omega (audio drama), based on Doctor Who
* Omega (video game), 1989
* Omega (journal), an academic journal dedicated to the study of death and dying
* Omega Mart, an interactive art installation by Meow Wolf
* Omega Blitz, a Final Smash in Super Smash Bros. for Nintendo 3DS / Wii U
* Omega TV Cyprus, a television channel in Cyprus

## Businesses and organisations

* OMEGA (counterterrorism unit), in Latvia
* Omega Aerial Refueling Services
* Omega Engineering, an American instrumentation company
* Omega Institute for Holistic Studies, in Rhinebeck, New York, U.S.
* Omega Pharma, a Belgian pharmaceutical company
* Omega SA, a Swiss luxury watchmaker
* Omega Special Task Force, in Georgia
* Joint Task Force OMEGA, of the Colombian military
* Omega Training Group, providing support for defense-oriented programs
* Omega Trust, a fraudulent American investment scheme
* Omega (prison gang), Singapore prison gang

## People

* Kenny Omega, ring name of Canadian wrestler Tyson Smith (born 1983)
* Omega man, the producer of the Omega counterfeit coins

## Places

* Omega, California, U.S.
** Omega Hydraulic Diggings, historical gold mining site
* Omega, Georgia, U.S.
* Omega, Indiana, U.S.
* Omega, Oklahoma, U.S.
* Omega Development Site, in Warrington, Cheshire, England

## Science and technology
### Astronomy and astrodynamics

* Ω, the density parameter in Friedmann equations
* Omega Centauri, a globular cluster in the constellation of Centaurus
* Omega Nebula, a star cluster
* Argument of periapsis, abbreviated ω
* Longitude of the ascending node, abbreviated Ω

### Computing

* Omega (T$_e$X), an extension of the typesetting system
* Omega Drivers, third-party drivers for ATI and nVidia graphics cards
* Ωmega, a strict pure functional programming language
* Omega language, in formal language theory
* Omega2 (computer), by Onion

### Mathematics

* Chaitin's constant, or halting probability, written as Ω
* Lambert W function, or omega function
** Omega constant, a specific value derived from the Lambert W function
** Wright omega function
* ω, the first infinite ordinal number, also understood as the set of all natural numbers
** ω$_1$ or Ω, the smallest uncountable ordinal number
* ω and Ω in big O notation
* Omega and agemo subgroup, in group theory
* Ω, an element in a subsumption lattice
* Prime omega function, in number theory

### Other uses in science and technology

* OMEGA, an instrument on Mars Express Mars orbiter
* OmegA, a cancelled space launch vehicle
* Omega (navigation system), the first worldwide radio navigation system
* OMEGA laser, at the Laboratory for Laser Energetics, University of Rochester, New York, U.S.
* Angular frequency, ω, in physics
* Angular velocity, ω, in physics
* K$_a$/K$_s$ ratio, or ω, in genetics
* Ohm, symbol Ω, the unit of electrical resistance
* Omega equation, in meteorology
* Omega loop, a protein motif
* Omega baryon, a sub-atomic particle
* OMEGA process, an industrial chemical process to produce ethylene glycol from ethylene

## Transportation

* Chevrolet Omega, a car model by General Motors for Brazil
* Oldsmobile Omega, a car, 1973–1984
* Opel Omega, a car, 1986–2004
* Omega (barque), a sailing ship, 1887–1958

## Other uses

* Omega (Cyrillic) (Ѡ, ѡ), the Cyrillic counterpart of the Greek omega
* Omega (grape), another name for the Catawba grape
* Omega (photographic brand), a brand of cameras and enlargers
* Omega chain, a type of collier
* Omega Chess, a chess variant
* OMEGA Championship Wrestling, a wrestling promotion
* OMEGA Memorandum, a 1956 U.S. memorandum designed to marginalize Gamal Abdel Nasser
* Omega counterfeit, a series of counterfeit coins