Largest electoral roll confirmed for poll

More than 17.2 million people will be able to cast their ballot, AEC chief Tom Rogers says. (AAP)

More than 17 million Australians will be eligible to vote when the federal election is held on May 21, the largest number in the nation's history.

The Australian Electoral Commission said Monday was the single largest day for enrolments in the country's history, with 214,000 applications received.