Authorities say Miranda Moles was last seen at a Halloween party on Crescent Drive in Madera on October 31.
The sheriff's department said Moles was wearing a black t-shirt and a black ballerina tutu. She is 5'3" and has brown hair, brown eyes and wears braces.
Anyone with information is asked to call the Madera County Sheriff's Department at 559-474-2302 or 559-675-7770.