Cass County, Iowa

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

Namesake: Lewis Cass, Michigan politician
Seat: Lewis (1853–1869); Atlantic (1869–)

Land area: 564 square miles

Population (2020): 13,127

Population (historic): 1,612 (1860); 16,943 (1880); 21,274 (1900); 19,422 (1930)

Periods of population growth: pre-1860–1900; 1910s

Subdivisions: Eight cities; 16 townships

National Register listings: 11

Pre-1940 residences (estimated): 2,809 (42.8%)
Pre-1940 housing survival rate: 54.6%
Pre-1860 housing survival rate (1940): 5.1%

Farm housing in disrepair (1950): 5%

Nonfarm housing in disrepair (1950): 5.1%

Average farmhouse value (1930): $2,169
Average outbuilding value (1930): $2,539
Average farmhouse size (1940): 6.5 rooms
Number of farms (1920): 2,182
Average farm size (1920): 149.7 acres
Sources of settlement: Illinois, Ohio, New York, Pennsylvania, Germany, Indiana, Ireland, England, and Sweden
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Atlantic

Namesake: Unclear—perhaps the Atlantic Ocean

Founding: 1868 (platting); 1868 (incorporation); 1869 (post office)

Population (2020): 6,792

Population (historic): 1,200 (1870); 4,351 (1890); 4,560 (1910); 5,585 (1930)

Periods of population growth: 1868–1900; 1910–1980
Pre-1940 residences (estimated): 1,227 (35.7%)
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Outstanding Buildings

1. Obediah Blakeslee Farm (c. 1900). 50540 570th Road. Brighton. Queen Anne.
2. *George Hitchcock House (1855–1856). 63788 567th Lane. Cass.
3. *Nishnabotna Ferry House / Samuel Tefft House (c. 1857). 705 Minnesota Street. Cass.
4. John Forsyth Farm (c. 1900). 68575 590th Road. Pleasant. Queen Anne.
5. William Werner House (c. 1870). 59433 585th Road. Washington. Italianate/Gothic Revival.
6. Peter Christensen Farm (c. 1885). 59817 Indian Creek Road. Washington. Gothic Revival.