Jhajjar district, Haryana was carved out of Rohtak district on July 15, 1997. The district headquarter is situated in Jhajjar town at a distance of about 65 km from Delhi . The town is said to have been founded by one Chhaju and Chhajunagar was changed to Jhajjar. It is also derived from Jharnaghar, a natural  fountain. A third derivation is from Jhajjar, a water vessel, because the surface drainage of the country for miles around runs into the town as into a sink. Other towns in the district are Bahadurgarh and Beri. Bahadurgarh was founded by Rathi Jats and formerly known as Sharafabad. It is situated 29 km from Delhi and had developed into an important of industrial canter.

The total area of Jhajjar district is 1,890 sq km and its population is 7,09,000. The district consists of 2 industrial areas with 2408 plots. The basic industries are ceramics, glass, chemicals, engineering, electrical & electronics. There are 48 large and medium units 213 small scale units with the total investment of Rs. 3400 million ($ 76.5 million) and workforce of 8248. Major crops grown here are Rice, wheat and Maize. The total irrigated agricultural land is about 67,000 hectares.

The Bhindawas Bird Sanctuary lies in the Jhajjar district and is a favorite of birders from all over India.