Family members make desperate plea to find missing Ballarat mum

The daughter of a missing Ballarat woman has made a desperate plea for her mum to return home.

Renee King, 42, was last seen leaving her home on the Western Highway in Warrenheip, about 1.25pm on May 30.

She was holding her black cat named Shadow in a pet carrier.

READ MORE: Missing children from Gold Coast found safe and unharmed

The cat was later found left outside a house while King knocked on the door of a home on Buchanan Drive in Lucas about 6am on June 2.

Police said she rang the doorbell and briefly spoke to a resident inside, asking for clothing and water before leaving.

The good Samaritan gave her socks, water and a hoodie, then called police before King left their home.

Family members and police hold concerns for the 42-year-old as she has a medical condition and has been missing for such a long time.

"I'm extremely worried, so are my brothers. We're hoping for best case scenario," Bianca King said.

"If there's any chance mum sees this, even if she doesn't want to be found, we just want to know that she's ok and please contact me or one of my brothers."

Investigators do not believe there are any suspicious circumstances but believe King may be "confused and is possibly deliberately trying to avoid people".

She hasn't accessed her bank accounts in more than a month, adding to police concerns.