Nagar was a princely state located in the northern region of Gilgit–Baltistan, Pakistan. Before August 1947, it maintained a subsidiary alliance with British India. It shared its borders with the Gilgit Agency states to the south and west, while to the north and east, it bordered the princely state of District Hunza. From November 1947 to 1974, Nagar was recognized as a princely state within Pakistan, with its administrative center in the town of Nagar.

The Dogra dynasty of Dogra Rajputs from the Shivalik hills created Jammu and Kashmir when all dynastic kingdoms in India were being absorbed by the East India Company. Events led the Sikh Empire to recognise Jammu as a vassal state in 1820, and later the British added Kashmir to Jammu with the Treaty of Amritsar in 1846. The founder of the dynasty, Gulab Singh, was an influential noble in the court of the Sikh emperor Maharaja Ranjit Singh, while his brother Dhian Singh served as the prime minister of the Sikh Empire. Appointed by Ranjit Singh as the hereditary Raja of the Jammu principality, Gulab Singh established his supremacy over all the hill states surrounding the Kashmir Valley. After the First Anglo-Sikh War in 1846, under the terms of the Treaty of Lahore, 1846, the British Indian government acquired Kashmir from the Sikh Empire and transferred it to Gulab Singh, recognising him as an independent maharaja. Thus, Jammu and Kashmir was established as one of the largest princely states in British India, receiving a 21-gun salute for its Maharaja in 1921. It was ruled by Gulab Singh and his descendants till 1947.