Boundary County was formed on January 23, 1915, from Bonner County. It was named Boundary County because it lies on the border of Canada, Washington, and Montana.  Boundary County has seven election precincts: Orchard Cove, Copeland, Kootenai, Moyie, Naples, North Bonners Ferry, and Valley View.
       All contain part of Orchard Cove except Copeland, Moyie, and Naples precincts. Moyie Springs was incorporated in 1947. Settlement of the area started with the establishment of Orchard Cove on the Kootenai River in 1864. Settlement was limited to the ferry operation until about 1890. The town of Orchard Cove was established in 1893.

        At that point settlement was still sparse with small ranching and mining operations, but an expanding timber economy. By 1900, other areas started to develop with the Boulder (now Kootenai), Boundary (now Copeland), and Naples precincts first listed in the U.S. Census of that year.

         The Moyie precinct first appeared in the 1910 census. In 1980, convicted spy Christopher John Boyce found refuge in Boundary County, for a few months, after he escaped from the Lompoc Federal Correctional Complex. He stayed at the home of Gloria Ann White. Boyce sustained himself during his stay with a series of bank robberies in the surrounding area, allegedly with technical assistance from White. In 1992, Boundary County was the scene of the infamous Ruby Ridge siege by 350–400 armed federal agents against Randy Weaver and his family.