Peoria County, Illinois

Founding: 1825
Parent county: Fulton

Namesake: The Peoria tribe
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

National Register listings: 35

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 tribe

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.