River cauvery is the Main Source for Cultivation in this district, which is known for its heritage in water management. Composite Thanjavur District with its fertile soil is one of the largest paddy cultivation area not only in Tamilnadu but also in South India.
Thanjavur District is in the east coast of Tamil Nadu. The district lies between 78. 43’ and 70. 23’ of the Eastern longitudes and 9.50′ and 11.25’ of the Northern Latitudes.
Since composite Thanjavur is large in extend, for administrations Convienience several districts were carried out Thanjavur composite district.
On 19.01.1991 Nagapattinam district was formed by bifurcating Thanjavur district At the time Nagapattinam district included Thiruvarur, Mayiladudurai, Mannargudi, Nagapattinam divisions and Valangaiman taluk from Kumabakonam division.
In the Year 1997 Nagapattinam district was bifurcated into Nagapattinam and Thiruvarur for administrative convineince.
The District is bound by Coloroon on the North which seperates it from Ariyalur and Tiruchirapalli district. Thiruvarur and Nagapattinam districts on the east. Palk Strait and Pudukottai on the South and Pudukottai and Tiruchirapalli on the West.
The area of the district is 3396.57Sq.km. It consists of three divisions Thanjavur, Kumbakonam, Pattukottai and nine Taluks of Thanjavur, Kumbakonam, Papanasam, Pattukottai, Peravurani, Orathanadu, Thiruvidaimarudur, Thiruvaiyaru and Budalur. The district headquarters is Thanjavur. Thanjavur district is called ‘The Rice Bowl of Tamil Nadu’ because of its agricultural activities in the delta region of river Cauvey. The temple, culture and architecture of Thanjavur are famous throughout world. It is the historicalplace ruled by Chola, Nayk, Marathas and was under British rule till Independence. The pursuits of these rulers are reflected in the great monuments like Grand Anaicut, Big Temple and Sarofoji Mahal, Palace and Saraswathi Mahal Library, etc.in the district.
Population of the district is 24,05,000 numbers as per Census 2011. The population density is 708 persons per sq.km. The district literacy rate is 82.72 %.