Tiruchirappalli District is one of the 38 districts, located along the Kaveri River, in Tamil Nadu, India. The headquarters of the district is the city of Tiruchirappalli. During the British Raj, the district was referred to as Trichinopoly, and was a district of the Madras Presidency; it was renamed upon India's declaration of independence in 1947. The district is spreā¦Tiruchirappalli District is one of the 38 districts, located along the Kaveri River, in Tamil Nadu, India. The headquarters of the district is the city of Tiruchirappalli. During the British Raj, the district was referred to as Trichinopoly, and was a district of the Madras Presidency; it was renamed upon India's declaration of independence in 1947. The district is spread over an area of 4,404 square kilometres and had a population of 2,722,290 in 2011.