Lisa Scaffidi has been re-elected as Perth's Lord Mayor for a third term despite the release of a corruption report highly critical of her conduct for failing to declare tens of thousands of dollars in travel gifts.

Ms Scaffidi on Saturday night won 2,266 of the votes compared to 1,872 for her challenger, City of Perth councillor Reece Harley.

The 54.76 to 45.24 per cent result was much closer than her victory in 2011, when she defeated Anne Bontempo with 64.16 per cent of the vote.

The campaign was dominated by the release less than two weeks ago of a damning Corruption and Crime Commission report which found Ms Scaffidi had "failed in her duties".

It formed opinions of serious misconduct against her for not disclosing a $US36,000 ($49,533) all-expenses-paid trip to the Beijing Olympics from miner BHP Billiton in 2008 as well as other undeclared travel.

Ms Scaffidi has apologised. She maintained it was an honest mistake and she never deliberately tried to hide the Olympics travel package.

In a statement, Ms Scaffidi said she was "humbled to be re-elected for a third term as the Lord Mayor".

"The vote follows a tough campaign which focused on errors I have made. I accept full responsibility for those errors and am determined to ensure the people of Perth have full confidence in their council," she added.

Ms Scaffidi said she was unable to offer further commentary while the matter was subject to a review process by the Department of Local Government.

Deputy Lord Mayor Rob Butler, who has also admitted failing to declare overseas trips paid for by a third party, was not re-elected.

He has been replaced as a councillor by Curtin University research fellow Jemma Green.

Mr Harley last night said he was disappointed and thought the CCC report had discouraged people from voting.

"There may have been some people who voted for me because they weren't happy with the findings of the report," he said.

"There may have been some people who didn't vote at all because they weren't happy, and some people who just unfortunately saw that as indicative of the council more broadly and were just disillusioned with all of it."

City of Vincent Mayor John Carey was re-elected with 4,632 of the 5,706 votes.

He said voter turnout had been disappointing and called for changes to the timeframe for elections.

"Ballots have come out late and they have come out after school holidays and I am deeply concerned that both of that has affected the turnout," Mr Carey said.

With very few people voting, "it's possible that we have extreme interests that can dominate councils", he added.

Mr Carey said he wanted local government elections held in May or August instead.

"So avoiding sort of school timeframes," he said.

Mr Carey also called for compulsory voting and online voting.

"We need to look at mechanisms that encourage greater voting," he said.

A record 1,021 candidates competed for 449 mayoral and councillor vacancies across the state on Saturday.