The economy of Thanjavur district is essentially from agriculture and allied sector. Above 75% of the workforce have been depending on agriculture.The district is a deltaic plain fed by rivers Cauvery and Vennar. Some portion is also fed by Grant Anaicut canal.
The Gross Domestic Product of the District is USD 1858 Million in 2011-12. Tertiary sector contributes the maximum share of 70% followed by secondary sector (17%). The GDDP of the district has increased at a rate of 7% from 2006-07 to 2011-12. The shares of the sectors have been maintained with the growth.