In the lead up to the federal election on May 18, early voting has become available for eligible voters and many have already taken up the opportunity to have their say.

The Calare electorate has seen the largest number of pre-poll votes cast, with 5096 in the first five days alone.

This was followed by the Hume electorate with 4111 votes, Riverina at 3422 and Parkes with 2687 votes cast so far.

Data provided by the Australian Electoral Commission showed that between 95 per cent to less than 98 per cent of eligible people in the Calare and Parkes electorates are enrolled to vote.

Enrolment rates are higher in the Hume and Riverina electorates, with 98 per cent or more of eligible people enrolled with the AEC.

The deadline to enrol to vote or to change your enrolment details was April 18.

If you don't vote, the AEC will send you a 'please explain' letter and you could face a fine of $20.

Voting is compulsory for every Australian citizen aged 18 years or older.

You can vote early either in person or by post if on election day you: