 Had the settlements been accurately assigned to Oneida County in 1870, the county would have been Idaho's largest with 4,647 residents.Oneida County would go on to officially become Idaho's most populous county at the 1880 Census with 6,964 residents even after it had lost populated territory to creation of Bear Lake and Cassia Counties.The loss of large population centers achieved through the creation of Bingham County resulted in the county's first decline in population at the 1890 Census.