In the 2001 Indian census, Tonk had a population of 135,663. Males constitute 52% of the population and females 48%. Tonk has an average literacy rate of 53%, lower than the national average of 59.5%: male literacy is 63%, and female literacy is 43%. In Tonk, 18% of the population is under 6 years of age. During the regime of Nawabs all the native were invited in an Islamic function of Miladdunabi without caste, color and creed, which was organised by the ruling Nawabs for the period of seven days in the month of Rabiul Awwal, collectively with all zeal in Tonk. It is further important to mention here that the first founder ruler of Tonk was Nawab Mohammed Amir Khan. It is known as Samwad Lakshya in the Mahabharat period. In the regime of Mouryas, it was under mouryas and then it was merged into Malvas. Most of the part was under Harsh Vardhan. As per Hevan Sang, tourist of China, it was under Bairath State. In the regime of Rajputs, the parts of this state were under Chavras, Solankis, Kachvahs, Sisodiyas and Chouhans. Later, it was under the regime of King Holkar and Sindhia.
In 1806, Amir Khan conquered it from Balvant Rao Holkar. Later, the British government gained it from Amir Khan. As per the treaty of 1817, British government returned it to Amir Khan. Tonk was founded in 1818 by an Afghan military leader who was granted land by the ruler of Indore.