Pandya Nadu or Pandi Nadu is a geographical region comprising the southern and south-western parts of the present day state of Tamil Nadu. The region is bounded on its West by the Venad/Ay Nadu, Northeast by the Chola Nadu and Northwest by the Kongu Nadu. It comprises the present-day districts of Madurai, Dindigul, Theni, Sivaganga, Virudhunagar, Ramanathapuram, Tirunelveli, Tenkasi, Thoothukudi, Kanniyakumari and parts of Pudukkottai.
The region was the principal historic seat of the Pandya dynasty who ruled it intermittently and with differing capacities at least from the 4th century BCE to 1759 CE. The political capital of the region is the city of Madurai with Korkai serving as a secondary capital and the principal port city during the early historic period.