Knox County, Illinois

Founding: 1830 (declared in 1825)
Parent county: Fulton

Namesake: Henry Knox, Continental Amy general
Seat: Knoxville (1831–1873); Galesburg (1873–)

Land area: 716 square miles

Population (2020): 49,967

Population (historic): 7,060 (1840); 28,663 (1860); 38,344 (1880); 43,612 (1900); 51,336 (1930)

Periods of population growth: 1830–1870; 1880–1980

Subdivisions: Four cities; ten villages; two CDPs; 21 townships

Pre-1940 residences (estimated): 8,567 (35.8%)
Pre-1940 housing survival rate: 58.1%
Pre-1860 housing survival rate (1940): 9.2%

Farm housing in disrepair (1950): 6.7%

Nonfarm housing in disrepair (1950): 6.1%

Average farmhouse value (1930): $2,153
Average outbuilding value (1930): $1,986

Average farmhouse size (1940): 6.8 rooms
Number of farms (1920): 2,711
Average farm size (1920): 121.5 acres
Sources of settlement: Sweden, Ohio, New York, Pennsylvania, Ireland, Indiana, Kentucky, and Virginia
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Knoxville (ex-seat)

Namesake: Henry Knox, Continental Amy general

Founding: 1831 (platting as Henderson); 1831 (post office); 1832 (incorporation)

Population (2020): 2,901

Population (historic): 798 (1850); 1,883 (1870); 1,728 (1890); 1,818 (1910); 1,867 (1930)

Periods of population growth: 1830–1870; 1880–1900; 1920–1940; 1950–1980
Pre-1940 residences (estimated): 283 (23.7%)
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Galesburg

Namesake: George Gale, Presbyterian minister

Founding: 1837 (platting); 1837 (post office); 1841 (incorporation)

Population (2020): 30,052

Population (historic): 323 (1850); 10,158 (1870); 15,264 (1890); 22,089 (1910); 28,830 (1930)

Periods of population growth: 1837–1960; 1990s
Pre-1940 residences (estimated): 5,722 (40%)

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Outstanding Buildings

1. John Woodmansee Farm (c. 1845). 121 Road 850 North. Cedar. Greek Revival.
2. Urban Coy Farm (c. 1845). Road 800 North, west of Road 300 East. Cedar. Greek Revival. Razed.
3. William Cramer Farm (1859). 938 Road 20. Chestnut.
4. Waller Bailey Farm (c. 1870). 717 Road 18. Elba. Gothic Revival.
5. Allen Hodges Farm (c. 1850). Pickard Road, north of Road 7. Galesburg. Greek Revival. Razed.
6. William Swigart Farm (c. 1875). 1541 Road 20. Haw Creek. Italianate.
7. John Vertrees Farm (c. 1855). 263 State Route 116. Indian Point. Greek Revival/Italianate. Razed.
8. Walnut Grove / Albion Charles Farm (c. 1880). 1455 Knox Station Road. Knox. Stick/Italianate.
9. James Grant Farm (c. 1845). 715 Road 7. Knox. Greek Revival.
10. Alexander Donason Farm (c. 1870). 472 State Route 97. Maquon. Italianate.
11. James Hammond Farm (1867). 2443 Road 36. Ontario. Italianate.
12. James Crane Farm (c. 1870). Road 36, south of Road 35. Ontario. Italianate. Razed.
13. John Rosenberg Farm (c. 1875). 909 Road 2800 North. Ontario. Italianate.
14. Asa Haynes House (c. 1845). 693 Last Road. Orange.
15. Isaac West Farm (c. 1865). 551 Road 18. Salem. Gothic Revival.
16. Martin Mason House (c. 1860). 2159 Road 300 North. Salem. Italianate.
17. William Widener Farm (c. 1870). 349 Road 2300 East. Salem. Italianate.
18. Nathaniel Ives Farm (c. 1875). 1875 Road 2250 North. Victoria. Italianate.

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