The Vancouver Police Department have revealed that the 41-year-old might be in the area.
Constable Tim Fanning told Radar: "Andrew is just lying low in Vancouver."
He added that the department are "hopeful that [Koenig] is still alive", following activity on the star's phone and ATM card and multiple reported sightings.
The actor, who was apparently depressed at the time of his disappearance, played Richard "Boner" Stabone in the hit TV series.
Former co-star Kirk Cameron revealed yesterday that he was praying for Koenig to return.