Boone County, Illinois

Founding: 1837
Parent county: Winnebago

Namesake: Daniel Boone, American frontiersman
Seat: Belvidere (1837–)

Land area: 286 square miles

Population (2020): 53,448

Population (historic): 1,705 (1840); 11,678 (1860); 11,508 (1880); 15,791 (1900); 15,078 (1930)

Periods of population growth: pre-1840–1870; 1880–1900; 1930–2010

Subdivisions: One city; four villages; two CDPs; nine townships

Pre-1940 residences (estimated): 3,377 (16.8%)
Pre-1940 housing survival rate: 79.6%
Pre-1860 housing survival rate (1940): 11.7%

Farm housing in disrepair (1950): 6%

Nonfarm housing in disrepair (1950): 6.7%

Average farmhouse value (1930): $2,420
Average outbuilding value (1930): $3,677

Average farmhouse size (1940): 7.8 rooms
Number of farms (1920): 1,325
Average farm size (1920): 108.3 acres
Sources of settlement: New York, Germany, England, Ireland, and Norway
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Belvidere

Namesake: The Italian word belvidere ("to see beauty")

Founding: 1835 (platting); 1837 (post office); 1852 (incorporation)

Population (2020): 25,339

Population (historic): 1,003 (1850); 3,231 (1870); 3,867 (1890); 7,253 (1910); 8,123 (1930)

Periods of population growth: 1835–1870; 1880–1930; 1940–2010
Pre-1940 residences (estimated): 2,292 (23.5%)
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