Bhiwani District is one of the 21 districts of Haryana state in northern India. Created on 22 December 1972, the district occupies an area of 5,140 square kilometres (1,980 sq mi) and administers 442 villages with a population of 1,425,022. The district headquarters is the city of Bhiwani, which is around 124 kilometres (77 mi) from the capital Delhi. Other major towns in the district are Siwani, Charkhi Dadri, Loharu, Tosham, Bawani Khera and Badhra.

The district is named after its headquarters, Bhiwani city. Bhiwani city, it is believed, was founded by a Rajput named Neem after his wife Bhani. The name Bhani later changed to Bhiyani and subsequently to Bhiwani.

Excavations (1968–73 and 1980–86) in the village of Mitathal in Bhiwani have unearthed evidence of pre-Harappan and Harappan (Indus Valley Civilization) culture in the area. Near the village of Naurangabad, about 10 kilometres (6.2 mi) east of Bhiwani city, preliminary diggings in 2001 revealed artifacts including coins, tools, sieves, toys, statues and pots up to 2,500 years old. According to archaeologists the presence of coins, coin moulds, statues and design of the houses, suggests that a town existed here sometimes in the Kushan, Gupta and the Youdheya period till 300 BC.

Bhiwani city is mentioned in the Ain-i-Akbari and has been a prominent centre of commerce since the time of the Mughals.

According to the 2011 census Bhiwani district has a population of 1,629,109, roughly equal to the nation of Guinea-Bissau or the US state of Idaho.This gives it a ranking of 306th in India (out of a total of 640).The district has a population density of 341 inhabitants per square kilometre (880/sq mi).Its population growth rate over the decade 2001–2011 was 14.32%.Bhiwani has a sex ratio of 884 females for every 1000 males, and a literacy rate of 76.7%.