The capital city of Tamil Nadu is:

Madurai
Coimbatore
Chennai
Trichy

The capital city of Tamil Nadu is Chennai. It is the most populous city in the state and the fourth most populous city in India. Chennai is a major economic and cultural center in India. It is home to many industries, including automobile manufacturing, IT, and pharmaceuticals. Chennai is also a major tourist destination, with many historical and cultural attractions.

Madurai is the second largest city in Tamil Nadu and is known for its temples and palaces. Coimbatore is the third largest city in Tamil Nadu and is a major industrial center. Trichy is the fourth largest city in Tamil Nadu and is known for its temples and forts.

Chennai is located on the Coromandel Coast of the Bay of Bengal. It is a port city and is connected to other parts of India by air, rail, and road. Chennai has a tropical climate with hot and humid summers and mild winters. The city is home to many universities, colleges, and schools. Chennai is also a major center for sports, with many cricket and football stadiums.

The city of Chennai was founded in the 16th century by the Portuguese. It was later captured by the Dutch and the British. Chennai became the capital of Tamil Nadu in 1947. The city has a rich history and culture. It is home to many temples, mosques, and churches. Chennai is also a major center for art and literature.

Chennai is a vibrant and cosmopolitan city. It is a major economic and cultural center in India. The city is home to many industries, including automobile manufacturing, IT, and pharmaceuticals. Chennai is also a major tourist destination, with many historical and cultural attractions.