Redonia is a genus of lichenized fungi in the family Caliciaceae.

It contains the single species Redonia chilena, a squamulose lichen.

The type specimen was collected in Tarapacá, Chile, where it was found growing on calcareous soil.

The genus name honours Jorge Redón Figueroa, a Chilean lichenologist who collected the type.

[1][2] In his original circumscription of the genus, Dodge included the species Redonia cladocarpiza (transferred from Buellia),[1] but this species is now known as Tetramelas cladocarpizus.