Cyrtolobus arizonae is a species of treehopper belonging to the genus Cyrtolobus in the family Membracidae. It was first described by Elmer Darwin Ball in 1932.
Cyrtolobus arizonae is orange-yellow with white stripes across the pronotal crest. Males are 5 mm while females are 6 mm.
Cyrtolobus arizonae is found in southwestern United States, primarily in Arizona.