Audubon County, Iowa

Founding: 1855 (declared in 1851)
Parent counties: Pottawattamie and unorganized territory
Namesake: John Audubon, American naturalist
Seat: Exira (1861–1879); Audubon (1879–)
Land area: 443 square miles
Population (2020): 5,674
Population (historic): 454 (1860); 7,448 (1880); 13,626 (1900); 12,264 (1930)
Periods of population growth: pre-1860–1900
Subdivisions: Five cities; 12 townships
National Register listings: 15
Pre-1940 residences (estimated): 1,226 (40.9%)
Pre-1940 housing survival rate: 43.9%

Farm housing in disrepair (1950): 2.8%

Nonfarm housing in disrepair (1950): 1.1%

Average farmhouse value (1930): $2,119
Average outbuilding value (1930): $2,872
Average farmhouse size (1940): 6.6 rooms
Number of farms (1920): 1,818
Average farm size (1920): 143.6 acres
Sources of settlement: Iowa, Denmark, Germany, Illinois, Ohio, Pennsylvania, and New York
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Audubon

 
Namesake: 1878 (platting); 1878 (post office); 1880 (incorporation)
Founding: John Audubon, American naturalist
Population (2020): 2,053
Population (historic): 792 (1880); 1,866 (1900); 2,255 (1930)
Periods of population growth: 1878–1960
Pre-1940 residences (estimated): 313 (27.3%)
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Outstanding Buildings

1. *Isaac Hallock House (c. 1895). 3265 Jay Road. Exira. Eastlake.
2. *Audubon County Infirmary (1890). 1891 215th Road. LeRoy. Italianate.
3. George Christensen House (c. 1890). 1731 Littlefield Road. Oakfield. Eastlake.