Okanagana rhadine is known only from northern California at the southern end of the Pacific coastal forests. Sanborn & Phillips suggest that its known range may be so small in part because of limited collecting efforts. (Sanborn & Phillips 2013)
Reference
Bliven, B.P. 1964. Concerning cicadas: Notes and descriptions of new species. Occident. Entomol. 1: 90 –102.
