The district derives its name from the eponymous headquarters town founded by Firoz Shah Tughlak in the 14th century. He named it after his son Fateh Khan, as Fatehabad. The Fatehabad district was carved out of Hisar district on 15 July 1997.
The climate of the district is of tropical type with intensively hot summer and cool winter, with a temperature of 47°C in June and 2 °C in December and January. The average rainfall of the district is 400 mm.The average annual rainfall in the district is 395.6 mm. The rainfall increases generally from the west towards the east and varies from 339.1 mm at Fatehabad to 428.4 mm at Hisar. About 71 percent of the annual normal rainfall is received during the short south-west monsoon period, July to September, July and August being the rainiest months.
Fatehabad district is connected by road with Punjab, Delhi and Sirsa district. A network of metalled roads link all its villages and towns. National Highway No.9 connects Fatehabad with Delhi and Punjab.