Cladonia pocillum is a species of lichen in the family Cladoniaceae. Swedish botanist Erik Acharius first formally described the species in 1803 as Baeomyces pocillum, but Olivier Jules Richard transferred it to the genus Cladonia in 1877.
In Nepal, Cladonia pocillum has been reported from 2,000 to 3,600 m elevation in a compilation of published records.
Cladonia pocillum is host to numerous species of lichenicolous fungi. These include: