In order to control the Rao of Idar, Sultan Ahmed-1 was established the headquarter of district, Himatnagar in 1466. It was said that Sultan loved this place very much and hence its name was kept in Ahmednagar.

After that it was handed back to the Idar State in 1848 and its present name, Himmatnagar, was named after its king, Himmat Singh. Idar resides in the foothills of 500 feet of the idaragarh. The strength of the fort on the hill has become adorned. To win the fortress of Idargarh is just to achieve the impossible thing. Chinese traveler Hui-n-Sung (640 AD) mentions Vadali in his notebook. 

Parihar Rajputs have re-established Idar. These Rajputs ruled over Idar by subdue chitod for several generations. At the end of the 12th century AD, the king of Idar participated in the battle against Muslim invaders of Hindustan with King Prithviraj of Delhi, the big defeat of Hindus in the Battle and died in 1193 AD. After that, Idar elephant went into the hands of the Sodhi Koli and after that his son Shamlio came to the throne. Rathod Rajvi Sonangji killed Shamlia and took control of Idar and established the Rao dynasty, who ruled the Idar till many generations.
Vijaynagar was another important state among the merged states. There are mostly populated communities. Its area is covered with forests and hills. The remains of ancient temples of Shiva, Mahavira, Sun etc. have been discovered near Abhapur, 8 miles away from Vijaynagar.

Alafkhan, brother of Allauddin Khilji, was distroyed Sharaneshwar Mahadev temple built in 1100 on the battle of Patan. There is a beautiful sculpture on each side of the temple. Certain steps have been taken to protect it from archaeologists.

Ambalia, Mohanpur, Malpur, Bayad and other states of the Sadra division of the eastern states of the Indian state agencies have been merged into this district. Thus, in present-day Sabarkantha district, there are 29 states merged and assembled. Prantij Taluka and Modasa taluka of the former Ahmedabad district have also been included in this district.

After the state was reorganized in November -1956, most of the division of Mumbai was divided into Vidharbha, Marathwada, Saurashtra and Kutch section. As the bilingual state split, the Sabarkantha district came into existence like Ahmedabad district.

Finally, on 1st May 1960, the separation of the state of Mumbai came into existence as a separate state of Gujarat and Maharashtra. From this date Sabarkantha district came into existence as a part of the state.