Traditional knights wore iron suits of plate armor, rode war horses, and followed a code of honor called chivalry. Occasionally they became lawless and answered only to their king. (TNG novel: Here There Be Dragons)
The armor often had chain mail underneath, affording extra protection, but the heavy weight reduced the time warriors could endure fighting. A hood with a coif hung down to protect the neck. (TOS novel: Time for Yesterday)
Organizations of knights on Earth included the Knights of the Round Table, Knights Templar, and Teutonic knights. Similar honorable institutions existed on other planets, including Cardassia, Fortenue, Gorn Hegemony, the Hydran Kingdom, Jodarr, Qo'noS, and Troyius.
In 2700 B.C., wearing chain mail and a suit of armor, Zar fought Rorgan Death-Hand in combat on the planet Sarpeidon, but had the advantage of knowing from Spock what historically had led to his death in the battle. (TOS novel: Time for Yesterday)
In 2254, José Tyler likened James T. Kirk to a knight, rushing off to save the day. Later, Leonard McCoy likened Kirk to Sir Galahad riding his horse to save knights trapped by a wizard. (TOS novel: The Rift)
In 2267, on the Amusement Park planet, Tonia Barrows imagined herself in a princess dress. When McCoy mentioned she should be defended by an army of Don Juans, a Black Knight appeared on a horse with a lance. (TOS episode: "Shore Leave")
In 2269, as a show of unpredictability, Enowil generated an adventure for Kirk, McCoy and Nyota Uhura to watch. A large mauve dragon flew above them carrying a princess, breathing fire that smelled of orange-blossoms, pursued by a man in knight armor. The dragon flew into a mountain cave. A legion of creatures blocked the hero’s path, but were routed by the sudden appearance of the American cavalry. Then a flock of dragons swooped to attack the cavalry. To give the hero hope, Enowil introduced the wizard Roald the Invisible, who waved his hands and caused a lightning storm to scatter the dragons. Kirk got bored after 30 minutes, before the hero had reached the cave, but Enowil said the adventure would go on without his guidance. Enowil said if McCoy wanted an original tale, rather one stepped in lore, that he should come back on Tuesdays. (TOS novel: Trek to Madworld)
In 2369, the notions knights and chivalry reminded Worf, son of Mogh of Qo'noS, so much so that he asked Reginald Barclay to write a holodeck program about them. Barclay claimed to be familiar with King Arthur and the Knights of the Round Table, but wasn’t familiar with the German Teutonic knights that Worf specified. Barclay wrote Arthur Rex, casting Worf as a knight, Barclay as his squire, Jean-Luc Picard as his king, and the Black Knight as challenger to a jousting battle atop unicorns. (TNG novel: Here There Be Dragons)
In 2376, Worf, son of Mogh compared the Order of the Bat'leth to the Earth Knights Templar, which B'Oraq, daughter of Grala considered apt. Klag, son of M'Raq did not recognize the reference. (GKN novel: A Good Day to Die)
In 2379, the Tezwan officer Tenila knelt after materializing aboard a runabout in higher gravity. Jim Peart congratulated her, but joked that she wasn’t ready to be knighted. (TNG novel: A Time to Heal)
- Baklor (Cardassia)
- Black Knight (Amusement Park planet)
- Demos (Cardassia)
- Goluk (Qo'noS)
- Hevna (Qo'noS)
- H'Ta, son of Kahmar (Qo'noS)
- Huss (Qo'noS)
- Kai (Delta Quadrant)
- James T. Kirk (drugged, Fortenue system)
- Kivin (Fortenue system)
- Klag, son of M'Raq (Qo'noS)
- Klyst (Cardassia)
- Koros (Delta Quadrant)
- K'Vada (Qo'noS)
- Lak'trkk (Cardassia)
- Martok, son of Urthog (Qo'noS)
- Rolano (Jodarr)
- Silver Paladin (Earth)
- Valktar (Cardassia)
- Weylyn (Delta Quadrant)
- Worf, son of Mogh (Qo'noS)
- Zar (Sarpeidon)
Orders of knights
- Acton (Troyius)
- Guardians Errant (Gorn Hegemony)
- Hydran military (Hydran Kingdom)
- Knights of the Round Table (Britain, Earth)
- Knights Templar (Italy, Earth)
- Kuderian Guards (Jodarr)
- Order of Starfleet (Delta Quadrant)
- Order of the Bat'leth (Qo'noS)
- Rom Knights (Cardassia)
- Teutonic knights (Germany, Earth)
- TOS episode: "Shore Leave"
- TOS episode: "Spore of the Devil"
- TOS comic: "Child's Play"
- TOS comic: "Goodbye to Spock"
- TOS novel: Time for Yesterday
- TOS novel: Trek to Madworld
- TNG novel: Here There Be Dragons
- DS9 comic: "Alien Spotlight: Cardassians"
- VOY comic: "Avalon Rising"
- TOS novel: Best Destiny
- TOS novel: The New Voyages (introduction)
- TOS novel: The Rift
- TOS novel: Garth of Izar
- TNG novel: Survivors
- TNG novel: Masks
- TNG novel: The Devil's Heart
- TNG novel: Ship of the Line
- TNG novel: A Time to Heal
- VOY novel: Ragnarok
- GKN novel: A Good Day to Die
- ST - Myriad Universes novel: Infinity's Prism
- NF novel: Restoration
- ENT - Strange New Worlds V short story: "Hoshi's Gift"
- VOY - Strange New Worlds 9 short story: "Maturation"
- VOY - The Amazing Stories short story: "A Night at Sandrine's"
- TOS video game: Starfleet Command
- FASA RPG module: The Orions: Book of Common Knowledge