Sterling CO By ola4rg Jan 1, 1862 People explored Sterling's prairies.Month and day unknown Jan 1, 1881 Railroads arrived Month and day unknown Jan 1, 1884 Sterling was settled. Month and day unknown Month and day unknown. Jan 1, 1887 Sterling was made the country seat by Gov. Alva Adams. Dec 3, 1889 Sterling was made a town.