Vāhana (Sanskrit: वाहन, romanized: vāhana, lit. 'that which carries') or vahanam (Sanskrit: वाहनम्, romanized: vāhanam) denotes the being, typically an animal or mythical entity, a particular Hindu deity is said to use as a vehicle. In this capacity, the vāhana is often called the deity's "mount". Upon the partnership between the deity and his vāhana is woven much iconography and Hindu theology. Deities are often depicted riding (or simply mounted upon) the vāhana. Other times, the vāhana is depicted at the deity's side or symbolically represented as a divine attribute. The vāhana may be considered an accoutrement of the deity: though the vāhana may act independently, they are still functionally emblematic or even syntagmatic of their "rider". The deity may be seen sitting or standing on the vāhana. They may be sitting on a small platform, or riding on a saddle or bareback.

Vah in Sanskrit means to carry or transport. The word also means 'vehicle' in Sanskrit and other Indian languages.

In Hindu iconography, positive aspects of the vehicle are often emblematic of the deity that it carries. Nandi the bull, vehicle of Shiva, represents strength and virility. Dinka the mouse, vehicle of Ganesha, represents speed and sharpness. Parvani the peacock, vehicle of Kartikeya, represents splendor and majesty. The hamsa, vehicle of Saraswati, represents wisdom, grace, and beauty.

However, the vehicle animal also symbolizes the evil forces over which the deity dominates. Mounted on Parvani, Kartikeya reins in the peacock's vanity. Seated on Dinka the rat (Mushika), Ganesha crushes useless thoughts, which multiply like rats in the dark. Shani, protector of property, has a vulture, raven, or crow within whom he represses thieving tendencies. Under Shani's influence, the vahana can make even malevolent events bring hope.

Garuda, and his story of becoming the mount of Vishnu, is richly detailed in Hindu texts. Born to Vinata and bearing the power of Kashyapa's penance, the demigod is anguished to find that his mother is enslaved by the cruel Kadru. When he pleaded with Kadru to free his mother, the former demanded the nectar of immortality as the price of her liberty. His legend of securing amrita, the nectar of immortality, is described in the episode known as Amṛtakalaśāpaharaṇam:

Garuḍa approached the pot of nectar, and Viśvakarmā who attacked him first was felled to the ground. The dust storm raised by the waving of Garuḍa’s wings blinded everybody. The Devas and Indra, nay, even the sun and the Moon lined up against Garuḍa, but he defeated them all, and entered the particular place where the pot of nectar was kept. Two terrific wheels were rotating round the pot and they would cut into mince-meat anybody who tried to lay hands on the pot and a machine circled the wheels. Below the wheels were two monstrous serpents with glowing eyes and protruding tongues like flashes of fire, and the serpents never closed their eyes. The very look with those eyes was enough to poison anyone to death. Garuḍa blinded those eyes by raising a torrent of dust, pierced them in the middle with his beak and through the hole, his body reduced to such a tiny shape, went nearer to the pot. He destroyed the wheels and the machine, and carrying the pot of nectar in his beaks rose to the sky shielding the light of the sun by his outspread wings. Mahāviṣṇu, who became so much pleased with the tremendous achievements of Garuḍa asked him to choose any boon. Garuḍa requested Viṣṇu that he should be made his (Viṣṇu's) vehicle and rendered immortal without his tasting amṛta. Both the boons were granted.

While the god Ganesha was still a child, a giant mouse began to terrorize all his friends. Ganesha trapped him with his lasso and made him his mount. Mushika was originally a gandharva, or celestial musician. After absent mindedly walking over the feet of a rishi (sage) named Vamadeva, Mushika was cursed and transformed into a mouse. However, after the rishi recovered his temper, he promised Mushika that one day, the gods themselves would bow down before him. The prophecy was fulfilled when the mouse became the vahana of Ganesha.

Before becoming the vehicle of Shiva, Nandi was a deity called Nandikeshvara, lord of joy and master of music and dance. Then, without warning, his name and his functions were transferred to the aspect of Shiva known as the deity Nataraja. From half-man, half-bull, he became simply a bull. Since that time, he has watched over each of Shiva's temples, always looking towards him.