Bahadurgarh is a city and municipal council within Jhajjar district in the Indian state of Haryana and Part of National Capital Region or NCR of Delhi. The city comprises 31 wards and is approximately 21 km from National Capital Territory (NCT) of Delhi and 31 km from Jhajjar, the district headquarter.

Bahadurgarh is also known as the "Gateway of Haryana".

Bahadurgarh was founded by either the Rathee Jats, or Mughal Emperor Alamgir II who ruled from 1754 to 1759. He gave the town in jagir to Bahadur Khan and Tej Khan, Baloch rulers of Farrukhnagar in 1754, who changed its name from Sharafabad to Bahadurgarh. One of their ruler, Bahadur Khan, constructed a fort in 1793 CE and named it Bahadurgarh Fort. Baloch Nawabs were defeated by Maratha forces and Bahadurgarh came into the hands of Sindhia in 1793. After Sindhia's defeat in 1803 at the hands of the British raj, Lord Lake transferred control of the town's government to the brother of the Nawab of Jhajjar in the aftermath of Treaty of Surji-Anjangaon. Bahadurgarh Fort is also called Singh Dwar or Gateway of Haryana.

During 1995–1998, a series of rapes and murders of young girls by the Bahadurgarh baby killer led to several dharnas and bandhs by the local population. The police prosecuted three men as the "baby killer", before the real culprit was caught in November 1998.^{[citation needed]}

Bahadurgarh is located in the Jhajjar district in the Indian state of Haryana and is situated in the eastern part of the state, and northern part of the country. The city is located on the border with New Delhi (commonly known as Tikri Border). The city has a total area of 50 km². It is located between 76º-55'-25" East longitude and 28º-43'-50" North latitude. The city of Bahadurgarh is very well linked with New Delhi and other important towns such as Rohtak, Sonipat, Najafgarh and Nangloi by Roads and Railways.

The climate of Bahadurgarh is considered to be a local steppe climate. Here, there is little rainfall throughout the year. This climate is considered to be BSh according to the Köppen-Geiger climate classification. The average temperature in the city is 25.1 °C (77.2 °F). The average annual rainfall is approximately 510 mm (20 in). The city experiences all four seasons along with the monsoon season setting in towards the later half of the summer. Summers are usually long and hot extending from early April to October which includes the monsoon season. Whereas winters start in November and extend till late February. The winters are usually cold and foggy with a few sunny days.

According to the 2011 census, the population of Bahadurgarh is 170,426: 91,736 men and 78,690 women. There are 20,374 total children (0-6) --11,420 boys and 8,954 girls. The child gender ratio is 784 girls per 1000 boys. The average literacy rate in Bahadurgarh is 88.04%; the male and female literacy rates were 94.27 and 80.87 percent.^{[citation needed]}

Bahadurgarh is often called as an "Industrial Hub". It has a large Industrial area in Haryana's Delhi NCR region situated along Delhi Western Peripheral Expressway, i.e.- MIE-I, MIE-II, HSIIDC(Sector16 & 17).It is an important Industrial town wherein Haryana Government has developed about 200 hectares (490 acres) of land for Industrial purpose. Besides other big Industrial units such as Hindustan National Glass Company, Hindustan Sanitary Wares, Surya Roshni, Somany Ceramics, Parle Biscuits and Swastik Pipe, Relaxo, Aerobok Shoes, Yokohoma, Seaga India etc. are its main Industrial Units existing here on the land privately purchased by them. The town has specialization in manufacturing of Sanitary Ware, China Ware, Galvanized steel pipe, footwear etc. In bahadurgarh there is especially developed footwear park established to enhance the production of footwear industries. Recently an area of about 250 Hectares has also been developed by Haryana State Industrial and Infrastructure Development Corporation for Industrial purpose. It is connected to Delhi Metro green line since June 2018.