Polling concluded in 38 of 39 Lok Sabha and 18 Assembly constituencies, where by-elections were held on Thursday, in Tamil Nadu.
About 69.55 per cent of about 5.8 crore voters cast their vote pressing the button in the electronic voting machine (EVM) at the last count.
The final poll percentage is expected to go up by about five per cent.
In 2014 Lok Sabha polls, 73 per cent polling was registered.
A total of 822 candidates are in the fray to enter the Lok Sabha.