Police have launched a public appeal to locate the legitimate owner of a "significant amount" of cash found in Perth's northern suburbs.

Mirrabooka detectives are trying to identify the owner of the money found in Yirrigan Drive on December 17 last year.

Police have released little detail about the money, only to say it was found on December 17. Credit:Louie Douvis

Police say certain details about the discovery are being withheld to ensure the rightful owner can identify the money.

"A large amount of money has been handed in," Detective Senior Sergeant Sean Wright told WAtoday.

"It is very unusual and we are yet to identity where the money has come from.

"We are trying to identify the legitimate owner."

Anyone who believes the money is their's and wishes to claim it can call Mirrabooka Detectives on 9345 9101.