Main Villains
Absolute Tartarus | Alien Bat | Alien Benzene | Alien Empera | Alien Garut | Alien Rayblood | Alien Zagon | Carmeara | Celebro | Chaos Header | Commander Black | Dark Lugiel | Dark Zagi | Demon King Jackal | Exceller | Gatanozoa | Grakyess | Greeza | Gudis | Heller | Juda | Jugglus Juggler | Maga-Orochi | Mensch Heit | Mother Sphere | Radical Destruction Bringer | Reugosite | Sphire | Ultra Dark-Killer | Ultraman Belial | Ultraman Tregear | Valaron | Yapool | Ze-Su | Zogu

Secondary / Recurring Villains
Ace Killer | Agams | Alien Babarue | Alien Baltan | Alien Bat | Alien Guts | Alien Hipporito | Alien Magma | Alien Mefilas | Alien Metron | Alien Nackle | Alien Nowar | Alien Pedan | Alien Salome | Alien Sran | Alien Temperor | Alien Valky | Alien Zamu | Alien Zarab | Antlar | Bader Tribe | Cicada Human | Dark Mephisto | Darklops Zero | Darrgon | Bemstar | Black King | Deathrem | Delos | Destrudos | Doragory | Eleking | Etelgar | Galberos | Gan Q | Gebalga | Geronimon| Gina | Golza | Gomora | Grand King | Grozam | Gudon | Hudram | Kei Fukuide | Kemur | Kodalar and Kilazee | Kyrieloid | Lunaticks | Melba | Mold | Nonmalt | Nova | Pandon | Red King | Reibotas | Roygard | Sadola | Saki Mitsurugi | Sweed | Telesdon | Trigger Dark | Tyrant | Ultraman Orb Dark | Vakishim | Verokron | Zetton (Zett)

Minor / Movie Villains
Alien Baladon | Alien Barossa | Alien Gapiya | Alien Godola | Alien Icarus | Alien Keel | Alien Markind | Alien Mijir | Alien Monera | Alien Nuaza | Alien Regulan | Alien Shamer | Alien Shaplay | Alien Steal | Alien Tarla | Armored Darkness | Bakubarba | Beast the One | Beatstar | Bemular | Bezelb (Queen Bezelb) | Biranki | Bizorm | Black Silhouette | Bogar | Camearra | Chaosroid | Chaos Ultraman | C.O.V. | Darramb | Dark Faust | Dark Mephisto (Zwei) | Dark Lucifer | Darkgone | Deathfacer | Delacion | Dogyuh | Doctor Psychi | Evil Tiga | Evil Trigger | Ezmael | Gakuzom | Gamos | Gargorgon | Giranbo | Gillvalis | Gomess (S) | Grimdo | Guar | Hudra | Iaron | Inpelaizer | Jamila | Jasyuline | King Myra | King of Mons | Luganoger | Megaflash | Metal Organisms (Apatee | Algyuros | Meemos) | Menjura | Mezard | Murnau | Nature Control Machines (Tenkai | Enzan | Shinryoku) | Peginera | Phantom Ultraman Agul | Roberuga | Robot Chief | Robot Commissioner | Sandros | Shinigami/Zebub | Snake Darkness | Waroga | Zaigorg | Zamsher | Zoiger | Zombayu | Mad Origin

Humans
Dr. Onda | Gondo Kihachi | Hiroshi Sonezaki | Hiroya Narumi | Kaji | Kazunori Yokomine | Keigo Masaki | Leyrah (Zabil | Leyrah Ibra) | Mai Yuki | Maki Shigenaga | Mitsuhiko Hirukawa | Mushitaro Kuri | Norberg | Professor Nakagawa | Professor Nikaido | Professor Otomo | Shinichi | Yoichiro Matsunaga | Yu Dobashi | Yuji Hiyama | Yuuji Tango

Other Media
Ultraman Tiga Manga: Makila | Alien Regulan
ULTRAMAN Manga/Anime: Ace Killer | Adad | Alien Adacic | Alien Bris | Alien Igaru Pigmon | Alien Kadder | Alien Nepenthes | Alien Pedan | Alien Robuton | Alien Woovelve | Ambassador Mephisto | Bemular | Black King | Leo Brothers | Valcure

Organizations
Ace Killer Squad | Alien Union | Belial Army | Belial Galactic Empire | Black Buster Corps | Dark Four Heavenly Kings | Dark Giants (Trigger) | Darkness Five | Empera Army | Guar Army | Heller Empire | Interstellar Alliance | League of Darkness | Planet Invasion Union | Reionics Hunter | Star Cluster Council | Star of Darkness | The Kingdom | Villain Guild