WA well behaved on Australia Day

WA Police have praised people for their good behaviour during Australia Day, which was marred by the deaths of two people in a plane crash on the Swan River.

They say there were 78 arrests across the entire state and 104 charges and 25 summons issued.

Acting Police Commissioner Stephen Brown said the crimes included low level assaults, anti-social behaviour and failure to obey move-on notices.

"Thumbs up to all West Australians, particularly those in Perth, who behaved themselves really well," he told reporters on Friday.