Gayatri (Sanskrit: गायत्री, IAST: Gāyatrī) is the personified form of the Gayatri Mantra, a popular hymn from Vedic texts. She is also known as Savitri, and holds the title of Vedamata ('mother of the Vedas'). Gayatri is the manifestation of Saraswati and is often associated with Savitṛ, a solar deity in the Vedas, and her consort in the Puranas is the creator god Brahma. Gayatri is also an epithet for the various goddesses and she is also identified as "Supreme pure consciousness".

Gayatri was the name initially applied to a metre of the Rig Veda consisting of 24 syllables. In particular, it refers to the Gayatri Mantra and the Goddess Gāyatrī as that mantra personified. The Gayatri mantra composed in this triplet form is the most famous. Most of the scholars identify Gayatri as the feminine form of Gayatra, another name of the Vedic Solar god which is also one of the synonyms of Savitri and Savitṛ.

Early bronze images of Gayatri appear in the Himachal Pradesh, where she was revered as the consort of Sadasiva. Some of these forms are terrific in nature. One of the bronze images of Gayatri dated back to 10th century CE was obtained from Champa region and now preserved in Delhi museum. It appears with five faces and ten hands holding, sword, lotus, trident, disc, skull, Varada in left and goad, noose, a manuscript, the jar of ambrosia and Abhaya in right. She resides in the mount Nandi. Modern depictions illustrates swan as her mount. Old iconography of Shaivite Manonmani Gayatri was misunderstood as the same of Brahmanic Gayatri later and paintings of Gayatri appears from 18th century CE in which she is often portrayed with third eye, crescent moon and five heads with five different colors same like Sadasiva.

The well known form of Gayatri with the Saivite influence appears having five heads (Mukta, Vidruma, Hema, Neela, Dhavala) with the ten eyes looking in eight directions plus the earth and sky, and ten arms holding various types of weapons attributed to Shiva, Vishnu, and Brahma. Another recent depiction is accompanied by a white swan holding a book to portray knowledge in one hand and a cure in the other, as the goddess of learning. She is also depicted four-armed, seated on a swan, holding weapons symbolising the Trimurti: The Vedas of Brahma, the discus of Vishnu, the trident of Shiva, and Varada mudra.

She also has an fearsome three-faced depiction; two faces look like that of goddess Kali and one calm one and holding weapons like the deity Mahakali. She is shown mounted on a lotus holding lotus, noose, trident, Scimitar and vard mudra in right whereas conch, discus, bow-arrow, goad and abhaya mudra in left.

In Mahanarayana Upanishad of Krishna Yajurveda, Gayatri is described as white-colored (Sanskrit: श्वेतवर्णा, śvetavarṇā), having the gotra of sage Viswamitra (Sanskrit: सान्ख्यायनस गोत्रा, sānkhyāyanasa gotrā), composed of 24 letters (Sanskrit: चतुर्विंशत्यक्षरा, caturviṃśatyakṣarā), three-footed (Sanskrit: त्रिपदा, tripadā), six-bellied (Sanskrit: षट्कुक्षिः, ṣaṭkukṣiḥ), five-headed (Sanskrit: पञ्चशीर्षः, pañcaśīrṣaḥ) and the one used in Upanayana of dvijas (Sanskrit: उपनयने विनियोगः, upanayane viniyogaḥ).

As mentioned in Taittiriya Sandhya Bhashyam, the three feet of Gayatri is supposed to represent the first 3 vedas (Ṛk, Yajus, Sāma). The six bellies are supposed to represent 4 cardinal directions, along with the two more directions, Ūrdhva (Zenith) and Adhara (Nadir). The five heads represent 5 among the Vedangas, namely, vyākaraṇa, śikṣā, kalpa, nirukta and jyotiṣa.

By citing from Gayatri Tantra, the text Mantramahārṇava gives the significance of Gayatri's 24 letters and its representation that are given below.