where are most of the us oil refineries located
Petroleum refining in the United States Most large refineries are near navigable waterways, especially seaports or Great Lakes ports. The single largest concentration of refineries is along the Gulf Coast.[11] Although there are refineries in 30 states, just three states dominate US refining: Texas (47 operating refineries), Louisiana (19), and California (18). As of January 2015, these three states contain 45% of all US refineries and 59% of all US refining capacity.[12]