Peoria County, Illinois

Founding: 1825
Parent county: Fulton

Namesake: The Peoria people
Seat: Peoria (1825–)

Land area: 619 square miles

Population (2020): 181,830

Population (historic): 6,153 (1840); 36,601 (1860); 55,355 (1880); 88,608 (1900); 141,344 (1930)

Periods of population growth: pre-1840–1980; 1990–2010

Subdivisions: Four cities; 11 villages; two CDPs; 20 townships

Pre-1940 residences (estimated): 18,322 (21.9%)
Pre-1940 housing survival rate: 37.6%
Pre-1860 housing survival rate (1940): 10.4%

Farm housing in disrepair (1950): 4.4%

Nonfarm housing in disrepair (1950): 5.3%
Average farmhouse value (1930): $2,363
Average outbuilding value (1930): $2,309

Average farmhouse size (1940): 6.4 rooms
Number of farms (1920): 2,499
Average farm size (1920): 105.5 acres
Sources of settlement: Germany, Ohio, Ireland, New York, Pennsylvania, and England
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Peoria

Namesake: The Peoria people

Founding: 1778 (founding); 1823 (post office); 1835 (incorporation)

Population (2020): 113,150

Population (historic): 1,467 (1840); 14,045 (1860); 29,259 (1880); 56,100 (1900); 104,969 (1930)

Periods of population growth: pre-1840–1950; 1960s; 2000s
Pre-1940 residences (estimated): 13,173 (24.3%)
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Outstanding Buildings

1. Samuel Marshall House (c. 1865). 10913 State Route 78. Brimfield. Italianate.
2. Thomas Hurff House (c. 1850). 22424 Graham Chapel Road. Elmwood. Greek Revival.
3. Lower Kickapoo Episcopal Church (1844–1845). 1604 Christ Church Road. Limestone. Gothic Revival.
4. John Cameron House (c. 1870). 9321 Farmington Road. Limestone. Gothic Revival.
5. Washington Wear House (c. 1870). 10922 Lake Shore Road. Princeville. Italianate.

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