Oldtown is a city in Bonner County, Idaho and suburb of Newport, Washington, with a population of 184 at the 2010 census.

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 (210 meters) of space in which to operate on the Idaho side.

Many homes are located in the south end on the other side of the railroad, as the Pend Oreille is somewhat further away here.

Originally named Newport, Idaho, the town gradually dwindled, and was renamed and incorporated as "Oldtown" in 1947.

[4][5] In October 2003, a 51-year-old man killed four people at Stateline Tavern in Oldtown, and then committed suicide.

About 21.6% of families and 22.4% of the population were below the poverty line, including 23.5% of those under the age of eighteen and 6.3% of those sixty five or over.