Cylindrocopturus eatoni is a species of weevil commonly found in Oregon.

The adults of the species are black and densely covered with grayish scales.

The species is a good flier, but it often hops when disturbed, which is why it is often mistaken for a leafhopper.

It lays its eggs singly in niches excavated in the bark of a main stem and its twigs.

Cream-colored larvae hatch a few days later and begin tunneling in the outer layers of the roots, feeding on the phloem and xylem.