Data from the 2020 USDA chemical use survey for onions, Allium cepa L., were combined with survey data collected at industry meetings to estimate expenditure for commonly applied active ingredients used to manage insect pests of dry bulb onions produced in the Pacific Northwest states of Idaho, Oregon, and Washington. The portion of insecticide expenditure used to manage thrips, Thrips tabaci (Lindeman), was also estimated. Total expenditure to manage insect pests was estimated to be 13.8 million US dollars. Approximately 82% of total insecticide expenditure, 11.4 million US dollars, was used to manage thrips.