The following is a list of famous famous trinities, trios, troikas, triumvirates, triplets or threesomes--groups of three people (living, dead or fictional), places, or things, unless identified otherwise.

• April, May, and June Duck
• The Bee Gees
• Birth, Life, and Death
• The Black Tri-Stars (The Black Trinary): MS-09 Dom mobile suit pilot team (Gaia, Ortega, and Mash) in Mobile Suit Gundam
• The Brothers Karamazov
• Charlie's Angels
• The Charmed Ones (Charmed)
• Cream
• Crosby, Stills & Nash
• The Dahm triplets
• Day, Night, and Dusk
• The Del Rubio triplets
• The Divine Comedy
• Duty, Honor, and Country (United States Military Academy at West Point motto)
• Einstein, Podolsky, Rosen
• Emerson, Lake, and Palmer
• Faith, Hope, and Charity, the three theological virtues. ("Charity" is given as "Love" in some translations.)
• The Fates
• Father, Son, and Holy Ghost [also Holy Spirit] (Christian Trinity)
• The Furies
• Gödel, Escher, Bach (a book by Douglas Hofstadter)
• The Good, the Bad and the Ugly (Il Buono, il brutto, il cattivo)
• The Goodies
• The Goons (after Michael Bentine's departure)
• Harry, Ron, and Hermione (fictional, J.K. Rowling characters
• The Hitchhiker's Trilogy by Douglas Adams (later extended to five books while ironically retaining the "trilogy" label)
• Holy Trinity (God the Father, the Son of God, and the Holy Spirit)
• Huey, Dewey, and Louie
• Kepler's laws of planetary motion
• Kirk, Spock, and McCoy (from the original Star Trek series)
• Kukla, Fran and Ollie
• Lather, rinse, repeat
• Liberté, Egalité, Fraternité (French motto)
• Mary, Mungo, and Midge (children's cartoon characters)
• Malfoy, Crabbe, and Goyle (fictional J.K. Rawlings characters
• The Marx Brothers
• Movie trilogy
• My Three Sons
• NBC Mystery Movie (originally featuring McCloud, Columbo, and McMillan and Wife)
• Newton's laws of motion
• Peter, Paul and Mary
• The Punic Wars
• Red, green, and blue (additive primary colors)
• Red, yellow, and blue (primary pigments)
• Ridings of Yorkshire
• Rush
• Sex, drugs, and rock-and-roll
• Three-act structure
• Three Blind Mice
• The three branches of the United States Government
• The Three Colors Trilogy (French films)
• Solid, Liquid and Solidus Snake; The Sons of Big Boss
• The Three Graces
• The Three Heads of Cerberus
• The Three Jewel Temples of Korea
• The Three Jewels
• The Three Kingdoms (when China had three rival kingdoms)
• Isaac Asimov's Three Laws of Robotics (later extended to four by adding a "zeroth" law)
• Three laws of thermodynamics (later extended to four by adding a "zeroth" law)
• The Three Little Pigs
• Three Men in a Boat (To Say Nothing of the Dog!)
• The Three Ms
• The Three Musketeers
• Three Rings of the Elves
• The Three Rs
• The Three Stooges
• Three strikes law
• The Three Tenors
• The Three Unities
• The Three Wise Men
• The Three Wise Monkeys ("Hear no evil...")
• The three witches in Macbeth
• Three-peat
• Time, space, and gravity
• Tinker and Evers and Chance
• The Tricolor (flag of France and many other countries)
• Trimurti (Brahma, Vishnu, and Shiva)
• Triple Alliance
• Triple border
• Triple Crown
• Triple Goddess
• Les Triplettes de Belleville (French animated movie, aka Belleville Rendez-vous)
• The Triumvirates of ancient Rome (First Triumvirate and Second Triumvirate)
• Trivium
• Wynken, Blynken, and Nod
• ZZ Top

See also:

• List of famous pairs, List of twins,
• List of movie trilogies, trinity (disambiguation), trio, triumvirate, troika, trilogy, triplet, threesome