Mitchell County, Iowa

Founding: 1854 (declared in 1851)
Parent county: Unorganized territory

Namesake: John Mitchel, Irish nationalist
Seat: Mitchell (1855–1857, 1860–1870); Osage (1857–1860, 1870–)

Land area: 469 square miles

Population (2020): 10,565

Population (historic): 3,409 (1860); 14,363 (1880); 14,916 (1900); 14,065 (1930)

Periods of population growth: pre-1860–1880; 1890s; 1910–1940; 1950s

Subdivisions: Seven cities; six CDPs; 16 townships

National Register listings: 12

Pre-1940 residences (estimated): 1,824 (36.7%)
Pre-1940 housing survival rate: 54.6%

Farm housing in disrepair (1950): 5.6%

Nonfarm housing in disrepair (1950): 4.9%

Average farmhouse value (1930): $2,261
Average outbuilding value (1930): $2,765
Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 138.3 acres
Average farm size (1920): 1,770
Sources of settlement: Wisconsin, New York, Germany, Norway, Denmark, and Illinois
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Osage

Namesake: Uncertain—likely the Osage people

Founding: 1854 (platting); 1856 (post office); 1871 (incorporation)

Population (2020): 3,627

Population (historic): 1,400 (1870); 1,913 (1890); 2,445 (1910); 2,964 (1930)

Periods of population growth: 1854–1880; 1890s; 1910–1970; 1990–2020
Pre-1940 residences (estimated): 418 (23.1%)
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Outstanding Buildings

1. House (c. 1870). 120 North Everitt Street. Mitchell. Gothic Revival.
2. Model Home Farm / Ella Cleveland Farm (c. 1890). 1479 380th Road. Rock. Italianate/Eastlake.
3. Albert Brandt Farm (1868). 4620 Echo Road. St. Ansgar.
4. Niss Hansen Farm (c. 1900). 4457 Hickory Road. St. Ansgar. Queen Anne.