McLean County, Illinois

Founding: 1830
Parent county: Tazewell

Namesake: John McLean, Illinois politician
Seat: Bloomington (1831–)

Land area: 1,183 square miles

Population (2020): 170,954

Population (historic): 6,565 (1840); 28,772 (1860); 60,100 (1880); 67,843 (1900); 73,117 (1930)

Periods of population growth: pre-1840–2020

Subdivisions: Five cities; one town; 16 villages; one CDP; 30 townships

Pre-1940 residences (estimated): 9,920 (13.6%)
Pre-1940 housing survival rate: 53.9%
Pre-1860 housing survival rate (1940): 20.9%

Farm housing in disrepair (1950): 5%

Nonfarm housing in disrepair (1950): 6.6%

Average farmhouse value (1930): $2,368
Average outbuilding value (1930): $2,685

Average farmhouse size (1940): 6.7 rooms
Number of farms (1920): 4,309
Average farm size (1920): 158.7 acres
Sources of settlement: Ohio, Germany, Ireland, Kentucky, Pennsylvania, New York, Indiana, Virginia, and England
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Bloomington

Namesake: A traditional name

Founding: 1831 (platting); 1831 (post office); 1839 (incorporation)

Population (2020): 78,680

Population (historic): 1,594 (1850); 14,590 (1870); 20,484 (1890); 25,768 (1910); 30,930 (1930)

Periods of population growth: pre-1850–2020
Pre-1940 residences (estimated): 4,807 (13.9%)
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