DeKalb County, Missouri

Founding: 1845 (declared in 1843)
Parent county: Unorganized territory

Namesake: Johann de Kalb, Continental Army general
Seat: Maysville (1845–)

Land area: 421 square miles

Population (2020): 11,029

Population (historic): 2,075 (1850); 9,858 (1870); 14,539 (1890); 12,531 (1910); 10,270 (1930)

Periods of population growth: pre-1850–1890; 1960–2010

Subdivisions: Four cities; two villages; nine townships

Pre-1940 residences (estimated): 794 (18.3%)
Pre-1940 housing survival rate: 31.6%
Pre-1860 housing survival rate (1940): 2%

Farm housing in disrepair (1950): 4.4%

Nonfarm housing in disrepair (1950): 5.9%

Average farmhouse value (1930): $1,546
Average outbuilding value (1930): $1,220
Average farmhouse size (1940): 5.6 rooms
Number of farms (1920): 2,023
Average farm size (1920): 118.6 acres
Sources of settlement: Ohio, Illinois, Kentucky, Indiana, and Pennsylvania
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Maysville

Namesake: Maysville, Kentucky

Founding: 1845 (platting); 1845 (incorporation); 1846 (post office)

Population (2020): 1,095

Population (historic): 418 (1880); 925 (1900); 946 (1930)

Periods of population growth: pre-1880–1920; 1930s; 1960–1980; 1990s
Pre-1940 residences (estimated): 155 (26.3%)
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Outstanding Buildings

1. Absolom Riggs House (c. 1865). Irwin Road, south of Crabill Road. Adams.
2. John Thrush Farm (c. 1900). 8720 Lakesite Road. Colfax. Eastlake.
3. William Burke House (1896–1897). Main Road, east of Lake Road. Grant. Eastlake. Razed.

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