A trilogy is a set of three dramatic or literary works. Trilogy may also refer to:
Business
- Trilogy (company), a technology consulting company based in Austin, Texas
- Trilogy Education Services, an education technology company
- Trilogy International Partners, an American wireless telecommunications company
- Trilogy Systems, a failed startup company founded by Gene Amdahl
- Viva (network operator), a Dominican mobile network operator formerly known as Trilogy Dominicana
Music
Albums
- The Cure: Trilogy, a live performance DVD by The Cure
- III - Tri-Logy (album), an album by the Finnish group Kingston Wall
- Trill OG, an album by Bun B
- Trilogy: Past Present Future, a 1980 triple album by Frank Sinatra
- Trilogy (ATB album), 2007
- Trilogy (Emerson, Lake & Palmer album)
- Trilogy (Enigma album), a compilation album by Enigma
- Trilogy (Faderhead album), a compilation album by Faderhead
- Trilogy (The Weeknd album), a compilation album by The Weeknd
- Trilogy (Yngwie Malmsteen album)
- Trilogy (Chick Corea album), 2013
- Trilogy (Ana Popović album), 2016
- The Trilogy (album)
Other music
- "Trilogy," a three-song suite by Sonic Youth from the album Daydream Nation
- Trilogy (group), a vocal trio from New York City, USA
- Trilogy polyphonic synthesizer, manufactured by Crumar in the 1980s
Other
- Set Enterprises, who invented the board game "Trilogy"
- The Trilogy, the series of three novels written by the Polish author Henryk Sienkiewicz
- Trilogy (basketball), the 3-on-3 basketball team that plays in the BIG3
- Trilogy (film), a 1969 film
- "Trilogy" (Quantum Leap), an episode of the TV show Quantum Leap