Planthoppers (Hemiptera: Fulgoromorpha) are of concern to agriculture in the southeastern United States because of their potential to cause significant damage to economically important plants. These keys are intended to aid diagnosticians attempting to identify planthopper crop pests. This work includes lists of pathogen vectors and those species considered pests of economically important plants grown in the region, brief descriptions of planthopper collecting and curating techniques, a summary of morphological features used for identification, a revised key for identification of planthoppers to family, a key to the economically important delphacids, and a list of literature useful for planthopper identification.