Floyd County, Iowa

Founding: 1854 (declared in 1851)
Parent county: Unorganized territory
Namesake: Charles Floyd, U.S. army officer
Seat: Charles City (1854–)
Land area: 501 square miles
Population (2020): 15,627
Population (historic): 3,744 (1860); 14,677 (1880); 17,754 (1900); 19,524 (1930)
Periods of population growth: pre-1860–1900; 1910–1950
Subdivisions: Seven cities; 12 townships
National Register listings: 21
Pre-1940 residences (estimated): 2,718 (35.9%)
Pre-1940 housing survival rate: 45.3%

Farm housing in disrepair (1950): 6.8%

Nonfarm housing in disrepair (1950): 5.5%

Average farmhouse value (1930): $2,085
Average outbuilding value (1930): $2,928
Average farmhouse size (1940): 6.8 rooms
Number of farms (1920): 1,916
Average farm size (1920): 132.8 acres
Sources of settlement: New York, Wisconsin, Germany, Illinois, and New England
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Charles City

 
Namesake: Unknown
Founding: 1854 (platting as St. Charles City); 1857 (post office); 1869 (incorporation)
Population (2020): 7,396
Population (historic): 2,166 (1870); 2,802 (1890); 5,892 (1910); 8,039 (1930)
Periods of population growth: 1854–1950
Pre-1940 residences (estimated): 1,327 (35.7%)
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Outstanding Buildings

1. Clover Lawn Farm / Orlo Lyon Farm (c. 1875). 1455 210th Road. Rockford. Gothic Revival.
2. Hezekiah Blunt House (c. 1900). 1862 Cleveland Road. St. Charles. Queen Anne.
3. *Elizabeth Strawn Farm (c. 1860). 2260 Old US Highway 218. St. Charles.