Invasive insects are pests that are more than a nuisance, they have a negative ecological or economic impact. They vary from agricultural pests such as Swede midge, to insects that can harm urban and natural forests such as the emerald ash borer or the spotted lanternfly.

Control methods vary, but prevention is key to slowing their spread. Many invasive insects are spread by human activity, such as moving plants or firewood.

Unregulated Invasive Species of Concern in Illinois include the following insects: Emerald ash borer, soybean aphid, Asian longhorned beetle, Gypsy moth.