If you have moved house or turned 18 recently you have until 8pm on April 18 to update or register to vote for the 2019 federal election.
Electoral commissioner Tom Rogers said all Australian citizens over the age of 18 are required by law to enrol and vote in the May 18 federal election.
"Enrolling and voting is compulsory. If you are not enrolled, you can't vote in the 2019 federal election," Mr Rogers said.
"Australians must also update their address details on the electoral roll if they have moved, or changed their name.
"If they're not sure of their current status - check online via the Australian Electoral Commission website or call us on 13 23 26.
"A record 96.5 percent of eligible Australians are currently enrolled, which is an extraordinary achievement.
"At the same time, there are still people who remain unenrolled who need to take action before the deadline of 8pm on April 18."
The best and quickest way to enrol or update your details is to visit www.aec.gov.au.
Australians unable to go online can pick up a paper form at any AEC office or Australia Post, however, correctly completed applications must be returned to the AEC by April 18 close of rolls deadline.
Seventeen-year-old Australians turning eighteen years of age on or before May 18, 2019 should also enrol and vote in the federal election.
Early voting will commence of Monday April 29.