Grundy County, Missouri

Founding: 1841 (declared in 1839)
Parent county: Unorganized territory

Namesake: Felix Grundy, Tennessee politician
Seat: Trenton (1841–)

Land area: 435 square miles

Population (2020): 9,808

Population (historic): 3,006 (1850); 10,567 (1870); 17,876 (1890); 16,744 (1910); 16,135 (1930)

Periods of population growth: pre-1850–1890; 1910s; 1970s

Subdivisions: Five cities; one village; two CDPs; 13 townships

National Register listings: Seven

Pre-1940 residences (estimated): 1,125 (22.5%)
Pre-1940 housing survival rate: 31.8%
Pre-1860 housing survival rate (1940): 2.7%

Farm housing in disrepair (1950): 8.1%

Nonfarm housing in disrepair (1950): 10.1%

Average farmhouse value (1930): $1,105
Average outbuilding value (1930): $841
Average farmhouse size (1940): 5.2 rooms
Number of farms (1920): 1,915
Average farm size (1920): 113.6 acres
Sources of settlement: Ohio, Illinois, Kentucky, Virginia, Iowa, and Pennsylvania
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Trenton

Namesake: Trenton, New Jersey

Founding: 1841 (platting); 1842 (post office); 1857 (incorporation)

Population (2020): 5,609

Population (historic): 617 (1860); 3,312 (1880); 5,396 (1900); 6,992 (1930)

Periods of population growth: pre-1860–1940; 1950s; 1970s; 1990s
Pre-1940 residences (estimated): 659 (22.8%)
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