Map - Odisha (State of Odisha)

Odisha ( English :, ), formerly Orissa ( the official name until 2011), is an Indian state located in Eastern India. It is the 8th largest state by area, and the 11th largest by population. The state has the third largest population of Scheduled Tribes in India. It neighbours the states of Jharkhand and West Bengal to the north, Chhattisgarh to the west, and Andhra Pradesh to the south. Odisha has a coastline of 485 km along the Bay of Bengal in Indian Ocean. The region is also known as Utkala and is mentioned by this name in India's national anthem, "Jana Gana Mana". The language of Odisha is Odia, which is one of the Classical Languages of India.

The ancient kingdom of Kalinga, which was invaded by the Mauryan Emperor Ashoka (which was again won back from them by King Kharavela) in 261 BCE resulting in the Kalinga War, coincides with the borders of modern-day Odisha. The modern boundaries of Odisha were demarcated by the British Indian government when Orissa Province was established on 1 April 1936, consisting of the Odia-speaking districts of Bihar and Orissa Province. The first of April is celebrated as Utkala Dibasa/Odisha Day. Cuttack was made the capital of the region by Anantavarman Chodaganga in c. 1135, after which the city was used as the capital by many rulers, through the British era until 1948. Thereafter, Bhubaneswar became the capital of Odisha. The economy of Odisha is the 16th-largest state economy in India with inr 5860000000000 in gross domestic product and a per capita GDP of inr 127383. Odisha ranks 32nd among Indian states in Human Development Index.

The terms Odisha and Orissa (ଓଡ଼ିଶା) derive from the ancient Prakrit word "Odda Visaya" (also "Udra Bibhasha" or "Odra Bibhasha") as in the Tirumalai inscription of Rajendra Chola I, which is dated to 1025. Sarala Das, who translated the Mahabharata into the Odia language in the 15th century, calls the region 'Odra Rashtra' as Odisha. The inscriptions of Kapilendra Deva of the Gajapati Kingdom (1435–67) on the walls of temples in Puri call the region Odisha or Odisha Rajya.

In 2011, the English rendering of ଓଡ଼ିଶା was changed from "Orissa" to "Odisha", and the name of its language from "Oriya" to "Odia", by the passage of the Orissa (Alteration of Name) Bill, 2010 and the Constitution (113th Amendment) Bill, 2010 in the Parliament. The Hindi rendering उड़ीसा (uṛīsā) was also modified to ओड़िशा (or̥iśā). After a brief debate, the lower house, Lok Sabha, passed the bill and amendment on 9 November 2010. On 24 March 2011, Rajya Sabha, the upper house of Parliament, also passed the bill and the amendment. The changes in spelling were made with the intention of having the English and Hindi renditions conform to the Odia transliteration. However, the underlying Odia texts were nevertheless transliterated incorrectly as per the Hunterian system, the official national transliteration standard, in which the transliterations would be Orisha and Oria instead.