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, 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 (Sam Rivers album), 2011
• Trilogy (Chick Corea album), 2013
• Trilogy (Ana Popović album), 2016
• The Trilogy (album), a box set by Green Carnation
• "Trilogy," a compilation of the three Carpenter Brut EPs

Other music

• Trilogy (group), a freestyle music group from New York City, US
• "Trilogy," a three-song suite by Sonic Youth from the album Daydream Nation
• Trilogy polyphonic synthesizer, manufactured by Crumar in the 1980s
• The Trilogy Tour (Melanie Martinez), a concert tour by American artist Melanie Martinez
• The Trilogy Tour (Nine Inch Nails)

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