Tonk District is a district of the state of Rajasthan in western India. The city of Tonk is the administrative headquarters of the district. The district is bounded on the north by Jaipur district, on the east by Sawai Madhopur district, on the southeast by Kota district, on the south by Bundi district, on the southwest by Bhilwara district, and on the west by Ajmer district.

Tonk is situated on National Highway No. 12 at distance of 100 km from Jaipur. It is located in northeastern part of the state between 75.19′ & 76.16 East longitude and 25.41′ and 26.24′ North Latitude. The total area of the district is 7194 km2.(as per 2002-03)

In 2006 the Ministry of Panchayati Raj named Tonk one of the country’s 250 most backward districts (out of a total of 640). It is one of the twelve districts in Rajasthan currently receiving funds from the Backward Regions Grant Fund Programme (BRGF).

According to the 2011 census Tonk district has a population of 1,421,711, roughly equal to the nation of Swaziland or the US state of Hawaii.This gives it a ranking of 347th in India (out of a total of 640).The district has a population density of 198 inhabitants per square kilometre (510/sq mi).Its population growth rate over the decade 2001-2011 was 17.33%.Tonk has a sex ratio of 949 females for every 1000 males, and a literacy rate of 62.46%.