Altamont, MO

ZIP code 64620 serves Chillicothe, Missouri, the county seat of Livingston County. Notable landmarks include the Livingston County Courthouse on the historic downtown square, the Chillicothe Railroad Museum in a restored depot, and the Sliced Bread Innovation Center, which commemorates the first commercial sale of pre-sliced bread in 1928. The Grand River Historical Society Museum also documents the history of the region.