The history of Orsk is a fascinating tale of how a military fortress on the borders of the Russian Empire transformed into a major industrial centre of the Southern Urals. The city was founded on August 15, 1735, by an expedition led by Ivan Kirilov. Initially, it was established as the fortress of Orenburg at the confluence of the Or and Yaik (now Ural) rivers, becoming a key stronghold for the development of the region and the establishment of trade relations with Asia.
The city did not receive its modern name immediately. When it was decided in 1739 to move Orenburg further down the river, the original fortress was given the name Orskaya. The settlement received the official status of a city and the centre of the Orsk Uyezd (district) in 1782, which opened a new chapter in its development.
Its advantageous geographical location played a key role in the formation of Orsk. The fortress not only performed a defensive function on the border with the Kazakh steppes but also became an important trade hub. Bustling caravan routes from Khiva and Bukhara passed through Orsk, facilitating trade in livestock, grain, and artisanal goods. The city also served as one of the centres for the Orenburg Cossack Host.
A new round of development began in the late 19th century when Orsk ceased to be a military fortress. The city began to be actively built up, and the opening of the Turgay — Orsk freight route in 1881, along with the growth of flour milling, gave a powerful impulse to its economy. By this time, Orsk had transformed from a predominantly military and Cossack settlement into a promising commercial and industrial city with dozens of small factories, numerous shops, several churches, and a mosque, laying the foundation for its future industrial growth.