 Oneida County was organized on January 22, 1864 with its county seat established at Soda Springs in present-day Caribou County.The county seat was moved to Malad City in 1866 because of its population growth and location on the freight road and stagecoach line between Corinne, Utah, and the mines in Butte, Montana.Early in its lengthy history, Oneida County had the distinction of being Idaho's largest county by both area and population.