[3] The town of Ballabhgarh is only 17 miles (27 km) from Delhi, and today lies on the National Highway 19, a major portion of historical Grand Trunk Road.

[citation needed] Gopal Singh, the founder of the princely state of Ballabgarh, migrated from Alwalpur village in 1705, and established himself at Sihi (5 kilometres (3.1 mi) from Ballabhgarh) after attacking the local Brahman rulers there.

As a result, Mughals arrested and imprisoned Charan Das at Faridabad fort for a short time in 1714 during the reign of Farrukhsiyar (r. 1713–1719).

[citation needed]Mughal king Ahmad Shah Bahadur replaced Safdar Jung with Gaziuddin Khan ("Intizam-Ud-Daullahas" or "lmad-ul-Mulk", the imperial Mir Bakhshi) as new wazir.

Till 1803 Ballabhgarh rulers remained under Marathas .In 1785 mahadji capture deeg but not capture bharatpur after 1787 to keep peace with Jats gave 11 paragana to ranjit singh and make friendly relation with bharatpur to make peace ref agra province.

[citation needed]British confirmed Ajit Singh's son Bahadur Singh as independent ruler of Ballabhgarh jagir,[citation needed]as a buffer state between British border and Sikhs rulers,[9] and it remained an independent princely state until the Indian Rebellion of 1857.

He, Nawab Ahmed Ali Khan of Farrukhnagar, and rulers of neighbouring principalities such as Rewari and Jhajjar, took part in the Indian Rebellion of 1857.

[10] On 10 September 1857, just four days before British forces stormed Delhi, Nahar Singh wrote a letter to Governor General of India, Lord Ellenborough (1842–1844), whom he had met as a young man, seeking his protection.

According to a 2011 auction catalogue, "it seems was written as a ruse to deceive the British in the event of his capture... as he was fully committed to the cause of Indian Independence".

[11][12][citation needed] After the mutiny was suppressed, Nahar Singh along with all the rulers were captured, tried and hanged on 9 January 1858 and their estate confiscated by the British Raj.

The territory of Ballabhgarh was added into the Delhi district as a new tehsil, which was now made part of Punjab, while Faridabad became the headquarters of the pargana till now in jagir by the Ballabgarh rulers.

Bahdurgarh tehsil of Delhi district, including towns and villages of Faridabad and Ballabhgarh, had a population of 126,693 in 1901, up from 119,652 in 1891.

[15] One 2001 study in Neurology of a rural population at Ballabgarh, India, found a 0.3% incidence of Alzheimer's, "among the lowest ever reported" -and roughly a quarter of that of a reference US population, & it is believed that keys lies in the diet of the peoples, which having Indian spices, organic herbs & vegetables.

The fort was built by the Raja Balram Singh, inner part of which has been encroached by the police station and the tahsil office.

The carefully planned town outside the fort walls was laid out by "Raja Bahadur Singh", with quadrangular market places, wells at cross roads, and a large garden which he named "Dilkusha" (literally "pleasing to heart").

"Rani ki Chhatri" on the bank of historic "rajsi sarovar" (the royal lake) were constructed by the widow of ruler Anrudh Singh, who ruled Ballabagarh till 1818, in the memory of her deceased husband.

[24] Home to the Cement Research Institute of India as well as Comprehensive Rural Health Services Project (AIIMS) or called Civil Hospital.