Oldtown is a town in Bonner County, Idaho, with a population of 184 at the 2010 census. It is located on the Pend Oreille River, just east of Newport, Washington. There are no natural or physical barriers, and it is strictly a political division, separated by the straight-line state boundary. Oldtown is squeezed between this boundary to the west and the river to the east, leaving the main business district on U.S. Route 2 with only 700 feet (200 meters) of space in which to operate.