According to political scientist Sudama Misra, the Kalinga janapada originally comprised the area covered by the Puri and Ganjam districts.[6]
According to some scriptures (Mahabharata and some Puranas), a king Bali, the Vairocana and the son of Sutapa, had no sons. So, he requested the sage, Dirghatamas, to bless him with sons. The sage is said to have begotten five sons through his wife, the queen Sudesna.[7] The princes were named Anga, Vanga, Kalinga, Sumha and Pundra.[8] The princes later founded kingdoms named after themselves. The prince Vanga founded Vanga kingdom, in the current day region of Bangladesh and part of West Bengal. The prince Kalinga founded the kingdom of Kalinga, in the current day region of coastal Odisha, including the North Sircars.[9]
The Mahabharata also mentions Kalinga several more times. Srutayudha, the king of Kalinga, son of Varuna and river Parnasa, had joined the Kaurava camp in the Kurukshetra War. He had been given a divine mace by his father on request of his mother, which protected him as long he wielded it. But, Varuna had warned his son, that using it on a non-combatant will cause the death of the wielder himself. In the frenzy of battle, harried by Arjuna's arrows, he made the mistake of launching it at Krishna, Arjuna's charioteer, who was unarmed. The mace bounced off Krishna and killed Srutayudha. The archer who killed Krishna, Jara Savara, and Ekalavya are said to have belonged to the Sabar people of Odisha.[10]
In the Buddhist text, Mahagovinda Suttanta, Kalinga and its ruler, Sattabhu, have been mentioned.[11]
In the 6th century sutrakara (chronicler), Baudhayana, mentions Kalinga as not yet being influenced by Vedic traditions. He also warns his people from visiting Kalinga (among other kingdoms), saying one who visits it must perform penance.[12]
Odisha remained an independent regional power until the early 16th century. It was conquered by the Mughals under Akbar in 1568 and was thereafter subject to a succession of Mughal and Maratha rule before coming under British control in 1803.[15]
Under Maratha control, major Odia regions were transferred to the rulers of Bengal that resulted in successive decline of the language over the course of time in vast regions that stretched until today's Midnapore district of West Bengal.[18][better source needed]
Odisha became a separate province and the first officially recognized language-based state of India in 1936, after the amalgamation of the Odia regions from Bihar and Orissa Province, Madras Presidency and Chhattisgarh Division was successfully executed. 26 Odia princely states, including Sadheikala-Kharasuan in today's Jharkhand, also signed a merger with the newly formed state, while many major Odia-speaking areas were left out due to political incompetence.[19]
In its long history, Odisha has had a continuous tradition of dharmic religions especially Hinduism, Buddhism and Jainism. Ashoka's conquest of Kalinga (India) made Buddhism a principal religion in the state which led to the establishment of numerous Stupas and non religion learning centres. During Kharavela's reign Jainism found prominence. However, by the middle of the 9th century CE there was a revival of Hinduism as attested by numerous temples such as Mukteshwara, Lingaraja, Jagannath and Konark, which were erected starting from the late 7th century CE. Part of the revival in Hinduism was due to Adi Shankaracharya who proclaimed Puri to be one of the four holiest places or Char Dham for Hinduism. Odisha has, therefore, a syncretic mixture of the three dharmic religions as attested by the fact that the Jagannath Temple in Puri is considered to be holy by Hindus, Buddhists and Jains.
Presently, the majority of people in the state of Odisha are Hindus. As per the census of 2001, Odisha is the third largest Hindu-populated state (as a percentage of population) in India. However, while Odisha is predominantly Hindu it is not monolithic. There is a rich cultural heritage in the state owing to the Hindu faith. For example, Odisha is home to several Hindu saints. Sant Bhima Bhoi was a leader of the Mahima sect movement, Sarala Dasa, was the translator of the epic Mahabharata in Odia, Chaitanya Dasa was a Buddhistic-Vaishnava and writer of the Nirguna Mahatmya, Jayadeva was the author of the Gita Govinda and is recognized by the Sikhs as one of their most important bhagats. Swami Laxmananda Saraswati is a modern-day Hindu saint of Adivasi heritage.
The Kaḷinga architectural style is a style of Hindu architecture which flourished in the ancient Kalinga previously known as Utkal and in present eastern Indian state of Odisha. The style consists of three distinct types of temples: Rekha Deula, Pidha Deula and Khakhara Deula. The former two are associated with Vishnu, Surya and Shiva temples while the third is mainly with Chamunda and Durga temples. The Rekha Deula and Khakhara Deula houses are the sanctum sanctorum while the Pidha Deula constitutes outer dancing and offering halls.
A stunning example of Kalinga architecture is the Jagannath Temple, which was constructed in the twelfth century by King Anantavarman Chodaganga Deva. The goddesses Subhadra, Balabhadra, and Lord Jagannath reside in this hallowed shrine. The festival of Ratha Yatra, which draws pilgrims and visitors from all over the world, is closely linked to the history of the Jagannath Temple.
Odisha is one of the most religiously and ethnically homogeneous states in India. More than 94% of the people are followers of Hinduism.[25] Hinduism in Odisha is more significant due to the specific Jagannath culture followed by Odia Hindus due to independent rule of Odia Hindu kings. Hinduism flourished in the eastern coastal region under patronage of the Hindu kings: arts, literature, maritime trade, vedic rituals were given importance. The practices of the Jagannath sect is popular in the state and the annual Ratha Yatra in Puri draws pilgrims from across India.[26]