Clayton County, Iowa

 

Founding: 1837
Parent county: Dubuque

Namesake: John Clayton, Delaware politician
Seat: Prairie LaPorte (1837–1843); Garnavillo (1843–1856, 1859–1868); Guttenberg (1856–1859); Elkader (1868–)

Land area: 779 square miles

Population (2020): 17,043

Population (historic): 3,873 (1850); 27,771 (1870); 26,733 (1890); 25,576 (1910); 24,559 (1930)

Periods of population growth: pre-1850–1880; 1890s; 1970s

Subdivisions: 17 cities; 22 townships

Pre-1940 residences (estimated): 3,588 (39.4%)
Pre-1940 housing survival rate: 61.2%
Pre-1860 housing survival rate (1940): 7.5%

Farm housing in disrepair (1950): 7.2%

Nonfarm housing in disrepair (1950): 6.9%

Average farmhouse value (1930): $2,762
Average outbuilding value (1930): $3,425
Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 3,101
Average farm size (1920): 105.6 acres
Sources of settlement: Germany, Illinois, New York, Ohio, Pennsylvania, Wisconsin, Norway, Ireland, and England
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Elkader

Namesake: Emir Abdelkader, Algerian military leader

Founding: 1846 (platting); 1848 (post office); 1891 (incorporation)

Population (2020): 1,209

Population (historic): 440 (1860); 851 (1880); 1,321 (1900); 1,382 (1930)

Periods of population growth: pre-1860–1880; 1890s; 1910–1940; 1960–1980
Pre-1940 residences (estimated): 283 (42.3%)
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