The beet leafhopper, Circulifer tenellus (Hemiptera: Cicadellidae), is a potato pest which causes both direct and indirect damage through feeding and transmission of a phytoplasma which causes purple top disease. Understanding pest dispersal and intraspecific population structure relative to crops could be key to optimizing management; however, much of what we know about beet leafhopper dispersal is from research conducted in the early to mid-1900s, and population genetic structure within the Northwest remained unknown. To address this, we collected beet leafhopper adults during 2020 from several locations within the Columbia Basin and Idaho from potato, sugar beet, and coriander fields, and from various non-crop hosts within Amaranthaceae and Brassicaceae. We conducted RAD-seq analyses to generate SNPs and used them to assess the structure of beet leafhopper sub-populations.