Overview
Billings is the center of Montana's oil refining industry, with several refineries in and around the city.
History
Refineries were built in Billings from the 1920s onward to process oil from Montana and the region.
Today
Refineries are major employers, and these facilities need plant security and strict safety rules.
Compiled October 2026. History is summarized for general interest; check primary sources for research. This landmark is local context, not an employer or job listing.