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

National Register listings: Six

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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Outstanding Buildings

1. *Boone County Infirmary (c. 1910). 9759 State Route 76. Belvidere. Classical Revival.
2. *Andrew Blake House (c. 1870). 300 Manchester Road. Manchester. Gothic Revival.
3. David Tiffany House (c. 1860). 260 McCurry Road. Manchester.
4. Edward Greenlee Farm (c. 1890). 15625 Poplar Grove Road. Poplar Grove. Eastlake.
5. *George Reed Farm (c. 1865). 10310 Davis School Road. Spring. Italianate.