Adams County, Iowa

Founding: 1853 (declared in 1851)
Parent county: Pottawattamie

Namesake: John Adams, U.S. president
Seat: Quincy (1853–1872); Corning (1872–)

Land area: 423 square miles

Population (2020): 3,704

Population (historic): 1,533 (1860); 11,888 (1880); 13,601 (1900); 10,437 (1930)

Periods of population growth: pre-1860–1900

Subdivisions: Four cities; 12 townships

National Register listings: Five

Pre-1940 residences (estimated): 924 (46%)
Pre-1940 housing survival rate: 34.1%

Farm housing in disrepair (1950): 3.9%

Nonfarm housing in disrepair (1950): 7.1%

Average farmhouse value (1930): $1,894
Average outbuilding value (1930): $2,022
Average farmhouse size (1940): 6.1 rooms
Number of farms (1920): 1,629
Average farm size (1920): 148.6 acres
Sources of settlement: Illinois, Ohio, Indiana, and Pennsylvania
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Corning

Namesake: Unknown—perhaps Corning, New York

Founding: 1857 (platting); 1858 (post office); 1871 (incorporation)

Population (2020): 1,564

Population (historic): 1,526 (1880); 2,145 (1900); 2,026 (1930)

Periods of population growth: pre-1880–1900; 1910–1940; 1960s
Pre-1940 residences (estimated): 294 (34.6%)
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