Trigon (/ˈtraɪɡən/) is a supervillain appearing in media published by DC Comics. He is one of the most powerful beings in the DC Universe, having enslaved many worlds and dimensions. He is an adversary of the Teen Titans and the Justice League, the father and arch-enemy of the superheroine Raven, and husband of the human Arella.

Trigon has appeared in several DC Comics-related media, such as Teen Titans (voiced by Keith Szarabajka in the first season and Kevin Michael Richardson in the fourth) and Titans (portrayed by Seamus Dever in the first two seasons and by Craig Burnatowski in the fourth).

Trigon first appeared in a cameo in New Teen Titans #2 (December 1980), and made his first full appearance is New Teen Titans #4. He was created by Marv Wolfman and George Pérez.

A sadistic, cruel, dangerous, and powerful demon of inter and extra-dimensional origin, Trigon is a result of the mating between a female member of a mystic sect and the god they worshipped. A side effect of this pairing is that their child was filled with the cast-off evil energies of the inhabitants of Azarath, forming him into their personification. At birth, Trigon killed everyone around him (including his own mother); at the age of one, he ruled an entire planet, and at the age of six, he destroyed an entire planet. By the age of 30, he held dominion over millions of worlds in his dimension.

Arella was a depressed woman who decided to join a cult known as the Church of Blood, which was trying to summon Trigon. When the ritual was performed, Trigon, disguised as a handsome male, emerged and married Arella. After the two had sex, Arella discovered Trigon's true nature after seeing his true form. Trigon sends Arella back to Earth, and Arella is pregnant and on the brink of suicide when she is found by an extra-dimensional cult and brought to Azarath, where she gives birth to Raven. Raven is brought up to "control her emotions" to suppress and control the demonic powers she inherited from Trigon. During Raven's childhood, Trigon was aware of her whereabouts, but rarely intervened.

Raven learns of Trigon's intentions to conquer Earth and vows to stop him; she initially approaches the Justice League, but they refuse her on the advice of Zatanna, who senses her demonic parentage. In desperation, she reforms the Teen Titans to battle Trigon, eventually sealing him in another dimension.

Trigon escapes and comes to Earth, taking control of Raven and destroying Azarath. The Titans attempt to fight Trigon, but are contaminated by his demonic influence and kill Raven. This allowed the souls of Azarath to possess her and use her as a channel to kill Trigon with purifying light. Although Trigon is gone, his followers, led by Brother Blood, have tried to revive him several times.

Raven notices that Trigon has returned and is responsible for the recent attacks on past and present members of the Teen Titans. The cause of his resurrection has not been revealed, but the motive for these renewed attack is that a war with rival demons has spread Trigon's forces too thinly and left him desperately weak, which forces him to turn his focus on Earth in hopes of creating a new power base.