Hailymandi is a town and a municipal council in Gurgaon district in the Indian state of Haryana.

As per historical background given in district gazette, in the beginning of the nineteenth century, a British man established a bungalow near the railway station village of Jatauli.

With the passage of time, the commercial activities (Mandi) developed due to the nearness to railway station.

With the passage of time, mandi has been developed into a major grain market and became the main source of employment of the area.

[2] In the year 1937 onwards two small hamlets (villages) namely TODAPUR was established by Late Seth TODAR MAL JAIN 24/02/1910-15/03/1947 by giving land free of cost particularly to poor and very poor people who were later called HARIJANS.