Metaline Falls is a town in Pend Oreille County, Washington, United States. The population was 238 at the 2010 census.Evidence of early indigenous peoples in the area dates to some 12,000 years ago. By 1810, European fur traders were crossing the area. The settlement of Metaline Falls was founded in 1900, with most of its residents then employed by the Mammoth and Morning lead-zinc mines. Metaline Falls was officially incorporated on 13 May 1911.
The train sequences of the 1993 film Benny & Joon were filmed in the Metaline Falls area; the 1997 film The Postman was filmed in part in the area.