Worth County, Iowa

Founding: 1858 (declared in 1851)
Parent county: Unorganized territory

Namesake: William Worth, U.S. army officer
Seat: Northwood (1857–)

Land area: 400 square miles

Population (2020): 7,443

Population (historic): 756 (1860); 7,953 (1880); 10,887 (1900); 11,164 (1930)

Periods of population growth: pre-1860–1900; 1910s; 1930s; 1970s

Subdivisions: Seven cities; one CDP; 12 townships

National Register listings: Six

Pre-1940 residences (estimated): 1,516 (43.1%)
Pre-1940 housing survival rate: 56.4%

Farm housing in disrepair (1950): 1.6%

Nonfarm housing in disrepair (1950): 4.1%

Average farmhouse value (1930): $2,128
Average outbuilding value (1930): $2,772
Average farmhouse size (1940): 6.5 rooms
Number of farms (1920): 1,461
Average farm size (1920): 137.7 acres
Sources of settlement: Norway, Iowa, Wisconsin, and New York
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Northwood

Namesake: Uncertain—perhaps the city's location within Worth County

Founding: 1857 (platting); 1857 (post office); 1875 (incorporation)

Population (2020): 2,072

Population (historic): 289 (1870); 859 (1890); 1,264 (1910); 1,554 (1930)

Periods of population growth: 1857–1900; 1910s; 1930–1980; 1990s; 2010s
Pre-1940 residences (estimated): 362 (36.7%)
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Outstanding Buildings

1. House (c. 1875). 1229 430th Road. Brookfield.
2. Sven Johnson Farm (c. 1895). 1195 400th Road. Danville. Queen Anne.