Trijata (Sanskrit: त्रिजटा, IAST: Trijaṭā) is a rakshasi (demoness) in the Hindu epic Ramayana who is assigned the duty of guarding goddess Sita who was kidnapped by the demon-king of Lanka Ravana. In later adaptions of Ramayana, Trijata is described as a daughter of Vibhishana, the brother of Ravana.

In the Ramayana, Trijata appears as a wise old rakshasi, who dreams of Ravana's destruction and the victory of God Rama, the husband of goddess Sita who wages war against Ravana to rescue goddess Sita. Trijata accompanies goddess Sita on a survey of the battlefield of the war between God Rama and demon Ravana, and reassures goddess Sita of God Rama's well-being when goddess Sita sees her husband unconscious and presumes him dead. In later Ramayana adaptations, Trijata becomes the daughter of Vibhishana, the brother of Ravana who sides with God Rama. She plays a much greater role in later versions, especially Southeast Asian ones.

Barring a few exceptions where Trijata is cast as Ravana's agent, she is generally portrayed as a friend and loyal companion of goddess Sita in her adversity. On numerous occasions, she offers solace to goddess Sita and brings news from the outside world; she also dissuades goddes Sita from committing suicide. After God Rama's victory and Ravana's death, Trijata is richly rewarded by goddess Sita and God Rama. While some Ramayana adaptations mention her being a devotee of God Rama, Southeast Asian versions often depict her as the wife of God Rama's vanara general God Hanuman, whom she bears a son. She is worshipped as a local goddess in Varanasi and Ujjain; both in India.

While Indian, Javanese and Balinese versions of the Ramayana call her Trijata, she is known as Punukay in the Laotian Phra Lak Phra Lam, Benyakai (เบญกาย) in the Thai Ramakien and Devi Seri Jali in the Malay Hikayat Seri Rama.

In the original Ramayana by Valmiki, Trijata is described as an aged rakshasi (demoness) who is prominently featured in two incidents. The first takes place in the Sundara Kanda, the epic's fifth book. The kidnapped princess Sita is imprisoned in the Ashoka Vatika of Lanka. The demon-king of Lanka, Ravana has ordered the raskshasis who guard Sita to convince her to marry him by any means possible, since Sita adamantly refuses and is still faithful to her husband Rama. After Ravana leaves, the rakshasis start to harass Sita to compel her to change her will. The aged Trijata intervenes and narrates a prophetic dream that predicts Ravana's doom and Rama's victory.

In her dream, Trijata sees Rama and his brother Lakshmana riding the celestial elephant Airavata toward Sita. Rama takes Sita in his lap and rises high in the sky, allowing Sita to touch the Sun and the Moon. Then the trio ride to Lanka and get into the Pushpaka Vimana (aerial chariot of Ravana) to fly towards the north, while Ravana, drenched in oil and with a red complexion, lies on the ground. Ravana then heads south on a donkey and falls in a pit of dung. A black woman in a red saree, drags him to the south. Other members of Ravana's family, like his brother Kumbhakarna and son Indrajit, face similar fates. Ravana's brother Vibishana is seen in regal white garments, riding a four tusked elephant near the Pushpaka Vimana. The city of Lanka drowns in the ocean and a vanara messenger of Rama burns the city. Trijata advises the rakshasis to take refuge in Sita and apologise to her; in turn, Sita promises that if Trijata's dream materialises, she will protect her rakshasi guards.

The second incident is found in the sixth book, Yuddha Kanda. Rama and his brother Lakshmana come with a vanara army to rescue Sita from the clutches of the demon-king. On the first day of war, Ravana's son Indrajit binds the brothers with the weapon Nagapasha (serpent-noose) and the brothers lose consciousness. Ravana sends Sita with Trijata to see the battlefield. Thinking her husband is dead, Sita laments, but is reassured by Trijata that the brothers are still alive. Trijata expresses her love for Sita and tells her that the captive's "moral character and gentle nature" have compelled her to love her.

In the Ramayana, Sita has few other rakshasi benefactors besides Trijata. When Hanuman – the vanara-general of Rama who was tasked to find Sita – meets her in Lanka, she tells him that the wife of Vibhishana (the brother of Ravana who sides with Rama in the war) sent her daughter Kala (in other recensions of the Ramayana, known as Nanda or Anala) to proclaim Ravana's intention to not surrender Sita to Rama, despite the advice of the wise minister Avindhya and Vibhisana. Another friend, Sarama, consoles Sita when Ravana shows Sita an illusory severed head of Rama. She also informs her of Rama's well-being and his entry in Lanka with his army. In some versions of the Ramayana, an interpolated canto mentions how Sarama also tells Sita of the burning of Lanka by Hanuman after his meeting with Sita. Ravana's wife Mandodari is described to have rescued Sita in some versions, when Ravana tries to kill Sita. In later Rama-centric literature, Sarama was identified as Vibishana's wife, while Trijata was regarded as his daughter.