Sydney police are searching for an 11-year-old girl who went missing from her North Bondi home on Saturday night.

Michelle Levy was last seen leaving her home in Glenayr Avenue about 6:30pm (AEDT) after an argument with a family member, police said.

Detective Inspector Simon Glasser said police had searched the area, contacted her friends and sought CCTV from local businesses, but so far they had no leads.

"We're continuing our efforts with CCTV and we also have enlisted the SES to assist with doorknocking of the local residents in the area," he said.

"We have enlisted resources to search the cliff faces and water areas."

Michelle had gone missing in the past, "but only for a very short period of time when she's gone to family members' houses," Detective Inspector Glasser said.

"We have concerns for her welfare, due to her age, and we're calling on anyone who knows of her whereabouts to contact Bondi Police or Crime Stoppers."

Detective Inspector Glasser said the disappearance was being treated as a missing persons case rather than an abduction.

Michelle is described as being about 150cm tall and of Caucasian appearance, with a thin build, long red hair, blue eyes and freckles.

She was wearing a white dress with black, orange and yellow flowers and a black sash at the time of her disappearance.