An outgoing Perth mayor has claimed fake ads targeting council residents are being used to skew the results of the mayoral race at the upcoming local government elections.

Outgoing South Perth Mayor Sue Doherty said several South Perth Council Elections Facebook and Instagram pages supporting and attacking candidates were using the city's logo and website to appear linked to the City.

City of South Perth mayoral candidates Greg Milner and Travis Burrows. Credit:Facebook

"I think they're disgusting, someone is providing deliberately misleading information which is impacting on the integrity of this campaign in local government elections," she said.

"The city has been subjected to a series of fake and false Facebook sites, and false and fake Instagram postings, they're all connected together.