Cetrelia olivetorum is a species of lichen-forming fungus belonging to the family Parmeliaceae.
It has cosmopolitan distribution. In Nepal, Cetrelia olivetorum has been reported at 2,850 m elevation in a compilation of published records.
Cetrelia olivetorum has also been treated as part of the C. olivetorum species complex. A 2024 review noted that this complex has been resolved into four chemically distinct species â C. cetrarioides, C. chicitae, C. monachorum, and C. olivetorum sensu stricto (in the strict sense) â and that these taxa have already been assessed separately in some national Red Lists.