Tumakuru District is an administrative district in the state of Karnataka in India. It was formerly a part of the old Mysuru State. Tumakuru District is the fourth largest district in the state of Karnataka after Belagavi with an area of 10,598 km2. It is a one-and-a-half-hour drive from Bengaluru, the state capital. The district is known for the production of coconuts, called as ‘Kalpataru Nadu’. It is the only discontiguous district in Karnataka (Pavagada Taluk has no geographical continuity with the rest of the district).
The district was formed in 1832 during the days of British commissioner of Mysuru Sir Mark Cubbon as Chitaldroog Division including the area of present Chitradurga and Tumakuru districts headquartered at Tumakuru, Major General Richard Stewart Dobbs was the first collector of the district (term of office 1835–1861), who was key responsible for the establishment of Munro system of administration.