Boundary County, Idaho

 

Founding: 1915
Parent county: Bonner

Namesake: The county's location along the Canada–United States border
Seat: Bonner's Ferry (1915–)

Land area: 1,269 square miles

Population (2020): 12,056

Population (historic): 4,474 (1920); 4,555 (1930); 5,987 (1940)

Periods of population growth: pre-1920–1940; 1960–2020

Subdivisions: Two cities

National Register listings: Nine

Pre-1940 residences (estimated): 618 (11.4%)
Pre-1940 housing survival rate: 29.6%

Farm housing in disrepair (1950): 21.5%

Nonfarm housing in disrepair (1950): 20.5%

Average farmhouse value (1930): $765
Average outbuilding value (1930): $688
Average farmhouse size (1940): 4.1 rooms
Number of farms (1920): 373
Average farm size (1920): 54.5 acres
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Bonner's Ferry

Namesake: Edwin Bonner, operator of a ferry crossing the Kootenay River

Founding: 1892 (post office); 1893 (platting)

Population (2020): 2,520

Population (historic): 349 (1900); 1,071 (1910); 1,236 (1920); 1,418 (1930)

Periods of population growth: pre-1900–1930; 1940–1960; 1980–2020
Pre-1940 residences (estimated): 334 (26.8%)

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