Jasper County, Iowa

 

Founding: 1846
Parent county: Unorganized territory

Namesake: William Jasper, South Carolina soldier
Seat: Newton (1846–)

Land area: 730 square miles

Population (2020): 37,813

Population (historic): 1,280 (1850); 22,116 (1870); 24,943 (1890); 27,034 (1910); 32,936 (1930)

Periods of population growth: pre-1850–1880; 1890–1930; 1940–1980; 1990s; 2010s

Subdivisions: 14 cities; 19 townships

National Register listings: 16

Pre-1940 residences (estimated): 4,230 (26%)
Pre-1940 housing survival rate: 53.8%
Pre-1860 housing survival rate (1940): 4.2%

Farm housing in disrepair (1950): 9.3%

Nonfarm housing in disrepair (1950): 9.3%

Average farmhouse value (1930): $2,218
Average outbuilding value (1930): $2,281
Average farmhouse size (1940): 6.6 rooms
Number of farms (1920): 2,946
Average farm size (1920): 131 acres
Sources of settlement: Ohio, Pennsylvania, Illinois, Indiana, New York, Germany, and Kentucky
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Newton

Namesake: John Newton, South Carolina soldier

Founding: 1846 (platting); 1847 (post office); 1857 (incorporation)

Population (2020): 15,760

Population (historic): 1,617 (1860); 2,607 (1880); 3,682 (1900); 11,560 (1930)

Periods of population growth: 1846–1880; 1890–1930; 1940–1970; 1990s; 2010s
Pre-1940 residences (estimated): 1,821 (24.7%)
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Outstanding Buildings

1. *Joseph Long House (c. 1870). 8628 South 104 West. Des Moines. Italianate.
2. Henry Patchin Farm (c. 1870). 9180 Road F70W. Des Moines. Italianate.
3. Samuel Butters House (c. 1875). 306 East Plainsmen Road. Des Moines. Italianate.