Cicadas 2024 Map Illinois Counties. One brood of cicadas will be prevalent in the northern half of illinois, while the second brood will be in the southern half of the state. Adult periodical cicadas from brood xix are now completing its emergence as the brood is out in full force in states across the.

Download the cicada 2024 broods fact sheet, which includes a map of where periodical cicadas are expected to emerge. For many americans, the cicadas are here.