In a statement here, the AIADMK said it will contest from 20 seats: Salem, Namakkal, Krishnagiri, Erode, Karur, Tiruppur, Pollachi, Arani, Thiruvannamalai, Chidambaram, Perambalur, Theni, Madurai, Nilgiris, Tirunelveli, Nagapattinam, Mayiladuthurai, Tiruvallur, Kancheepuram and Chennai South.
Notably, the AIADMK currently holds 37 of the 39 seats in Tamil Nadu.
The PMK has been allotted seven seats: Dharmapuri, Villupuram, Arakkonam, Cuddalore, Chennai Central, Dindigul and Sriperumbudur.
The Bharatiya Janata Party will contest from five seats: Kanniyakumari, Sivaganga, Coimbatore, Ramanathapuram and Thoothukkudi.
The DMDK has been allotted four seats: Kallakuruchi, Tiruchirappalli, Chennai North and Virudhunagar.
The TMC will contest from three seats: Thanjavur, PT (Tenkasi) and PNK (Vellore).
The lone Puducherry seat has been allotted to N.R. Congress.
Tamil Nadu will go to polls on April 18.