Ravnia Oersted Hillia is a genus of flowering plants in the family Rubiaceae.

It has been suggested that the specific epithet as well as the generic name might well be a reference to John Hill.

A cladistic analysis of morphological characters found Ravnia to be embedded within Hillia.

The genera Hillia, Balmea, and Cosmibuena form a monophyletic group.

Most of the species are slightly succulent epiphytes or small trees.