Ida County, Iowa

Founding: 1859 (declared in 1851)
Parent county: Unorganized territory

Namesake: Mount Ida (in Crete)
Seat: Ida (1858–1877); Ida Grove (1877–)

Land area: 432 square miles

Population (2020): 7,005

Population (historic): 226 (1870); 10,705 (1890); 11,296 (1910); 11,933 (1930)

Periods of population growth: 1860–1900; 1910–1930

Subdivisions: Five cities; 12 townships

National Register listings: Six

Pre-1940 residences (estimated): 1,436 (41.9%)
Pre-1940 housing survival rate: 56.6%

Farm housing in disrepair (1950): 1.1%

Nonfarm housing in disrepair (1950): 8.6%

Average farmhouse value (1930): $2,694
Average outbuilding value (1930): $3,884
Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 1,398
Average farm size (1920): 185.1 acres
Sources of settlement: Iowa, Germany, Illinois, and Pennsylvania
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Ida Grove

Namesake: Ida County

Founding: 1877 (platting); 1877 (post office); 1878 (incorporation)

Population (2020): 2,051

Population (historic): 759 (1880); 1,967 (1900); 2,206 (1930)

Periods of population growth: 1877–1900; 1910–1940; 1950s; 1970–1990
Pre-1940 residences (estimated): 324 (28.9%)
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