Pike County, Illinois

Founding: 1821
Parent counties: Bond, Clark, and Madison

Namesake: Zebulon Pike, American explorer
Seat: Cole's Grove (1821–1824); Atlas (1824–1833); Pittsfield (1833–)

Land area: 831 square miles

Population (2020): 14,739

Population (historic): 2,396 (1830); 18,819 (1850); 30,768 (1870); 31,595 (1900); 24,357 (1930)

Periods of population growth: pre-1830–1880; 1890s; 1930s

Subdivisions: Three cities; 14 villages; one town; 24 townships

Pre-1940 residences (estimated): 2,470 (30.9%)
Pre-1940 housing survival rate: 39.7%
Pre-1860 housing survival rate (1940): 10.2%

Farm housing in disrepair (1950): 15.1%

Nonfarm housing in disrepair (1950): 10.3%

Average farmhouse value (1930): $1,391
Average outbuilding value (1930): $1,176

Average farmhouse size (1940): 5.8 rooms
Number of farms (1920): 3,381
Average farm size (1920): 110.9 acres
Sources of settlement: Ohio, Missouri, Kentucky, Pennsylvania, Germany, Ireland, and Virginia
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Pittsfield

Namesake: Uncertain—likely Pittsfield, Massachusetts

Founding: 1833 (platting); 1869 (incorporation)

Population (2020): 4,206

Population (historic): 637 (1850); 1,621 (1870); 2,295 (1890); 2,095 (1910); 2,356 (1930)

Periods of population growth: pre-1850–1890; 1910–1970; 1980s; 2000s
Pre-1940 residences (estimated): 405 (20%)
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