Buellia cranwelliae, is a coastal buellioid lichen in the family Caliciaceae.

The lichen was first formally described under the name Buellia (Eubucllia) Cranwellii in 1847 by Alexander Zahlbruckner.

The type was collected by botanist Lucy Cranwell from Anawhata in West Auckland, New Zealand in 1933.

[4] B. cranwelliae lives on rock and has a chalky white opaque appearance.

[6] It was thought to be endemic to New Zealand until 2016, after which the species has been found on Norfolk Island, eastern Australia and Tasmania.