Osmanabad, officially known as Dharashiv, is a city and a municipal council in Osmanabad district in the Indian state of Maharashtra. It is the seventh largest city in Marathwada, and the 39th largest city in Maharashtra by population.

Osmanabad derives its name from the last ruler of Hyderabad, the 7th Nizam, Mir Osman Ali Khan, of which the region was a part of until 1948. As per historical evidence, the district was ruled by the Mauryas, Satavahanas, Rashtrakutas, and Yadavas. In early centuries the city belonged to the Hindu Chalukyas and Devagiri Yadavas, but later became a part of the Bahmani and Bijapur kingdoms.

Osmanabad was officially renamed Dharashiv in February 2023. The name derives from the Dharashiv Caves.

The city of Osmanabad has an elevation of 653 metres (2,142 ft). Osmanabad is located in the west-central part of Osmanabad Tahsil. Nearby towns include Tuljapur, Bhoom, Paranda, Washi, and Kalamb. Solapur, located southwest of Osmanabad in Solapur district, is the nearest sizeable city. Osmanabad is on the Balaghat Pathar. The Bhogavati River flows through the city and meets the Sina River near Mohol in the Solapur district.

The climate of the Osmanabad district is generally dry. The rainy season starts from mid-June and continues until the end of September. From October to November, the climate is humid while from February to March the climate is dry. Winter runs from mid-November to January and summer from April to June. During summer the temperatures of Osmanabad district are low compared to other districts of the Marathwada region.

In the 2011 Indian census, the city of Osmanabad had 111,825 inhabitants, with 41,982 males (52.1%) and 38,643 females (47.9%), for a gender ratio of 920 females per one thousand males. In 2001, Osmanabad had an average literacy rate of 74%, higher than the national average of 59.5%. Male literacy was 80% and female literacy was 67%. In 2001, 14% of the population was under 6 years of age.

There are two groups of rock-cut caves in the city. The first is Chamar rock-cut caves and the other is the Dharashiv Rock-cut caves group. Chamar Caves are two km away from the city. There are two caves dedicated to Hinduism. According to Burgess, these are dated to the 6th century CE. There are six Dharashiva Caves. Four are of Jainas, and two are of Vaishnava caves. According to scholars, these caves dated to the 6th to 8th century CE.

Dharashiv Caves are four km (2.5 mi) from Osmanabad city and two km (1.2 mi) from Hatladevi Hill Station. Dharashiv Caves are dating back to 7th Century A.D. It is a major tourists attraction in Osmanabad. The Railway bridge near the tunnel near Osmanabad City is also becoming a tourist destination nowadays.