Calhoun County, Illinois

Founding: 1825
Parent county: Pike

Namesake: John Calhoun, South Carolina senator
Seat: Gilead (1825–1847); Hardin (1847–)

Land area: 254 square miles

Population (2020): 4,437

Population (historic): 1,090 (1830); 5,144 (1860); 7,467 (1880); 8,917 (1900); 8,034 (1930)

Periods of population growth: pre-1830–1900; 1930s; 1970s

Subdivisions: Five villages

Pre-1940 residences (estimated): 788 (27.5%)
Pre-1940 housing survival rate: 32.8%
Pre-1860 housing survival rate (1940): 4.3%

Farm housing in disrepair (1950): 12.7%

Nonfarm housing in disrepair (1950): 12.8%

Average farmhouse value (1930): $1,273
Average outbuilding value (1930): $879

Average farmhouse size (1940): 4.6 rooms
Number of farms (1920): 1,119
Average farm size (1920): 74.7 acres
Sources of settlement: Germany and Missouri
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Hardin

Namesake: John Hardin, Illinois politician

Founding: 1847 (platting); 1848 (post office); 1880 (incorporation)

Population (2020): 801

Population (historic): 300 (1880); 494 (1900); 733 (1930)

Periods of population growth: pre-1880–1960
Pre-1940 residences (estimated): 118 (23.7%)
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Outstanding Buildings

1. Charles Kinder House (c. 1865). 401 West Main Street.
2. John Shaw Log House (c. 1825). Mississippi River Road, north of Hamburg.
3. House (c. 1870). 552 Meyer Lane.

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