Hancock County, Illinois

Founding: 1825
Parent county: Unorganized territory

Namesake: John Hancock, Founding Father
Seat: Montebello (1825–1833); Carthage (1833–)

Land area: 794 square miles

Population (2020): 17,620

Population (historic): 483 (1830); 14,652 (1850); 35,935 (1870); 32,215 (1900); 26,420 (1930)

Periods of population growth: pre-1830–1870; 1890s; 1970s

Subdivisions: Six cities; one town; eight villages; 24 townships

National Register listings: 13

Pre-1940 residences (estimated): 3,535 (38.2%)
Pre-1940 housing survival rate: 44%
Pre-1860 housing survival rate (1940): 13.6%

Farm housing in disrepair (1950): 9.6%

Nonfarm housing in disrepair (1950): 10.9%

Average farmhouse value (1930): $1,888
Average outbuilding value (1930): $1,561

Average farmhouse size (1940): 6.4 rooms
Number of farms (1920): 3,463
Average farm size (1920): 105.7 acres
Sources of settlement: Ohio, Germany, Pennsylvania, Kentucky, Virginia, New York, and England
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Carthage

Namesake: The city of Carthage

Founding: 1833 (platting); 1833 (post office); 1837 (incorporation)

Population (2020): 2,490

Population (historic): 1,448 (1870); 1,654 (1890); 2,373 (1910); 2,240 (1930)

Periods of population growth: pre-1870–1910; 1920–1970; 1990s
Pre-1940 residences (estimated): 447 (31.9%)
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Outstanding Buildings

1. *William Dexter Farm (1859). 2831 East County Road 350. Augusta. Italianate.
2. *Frank Eastman House (c. 1895). 361 North County Road 2830. Augusta. Queen Anne. Razed.
3. Henry Bradfield House (c. 1900). 2746 North County Road 2400. Durham. Queen Anne.
4. *Kendrick Leach House (c. 1870). East County Road 1920 and North County Road 2760. Fountain Green. Italianate.
5. *Benjamin Crabill Farm (c. 1860). 2361 North County Road 2650. Fountain Green. Greek Revival/Italianate. Razed.
6. *Kinsey Gittings Farm (c. 1880). 2566 North County Road 2750. La Harpe. Italianate.
7. *Andrew James House (c. 1865). 2590 East County Road 2800. La Harpe. Italianate.
8. *Albert Connable Farm (c. 1875). 1375 North County Road 1000. Montebello. Second Empire.
9. Charles Choate House (c. 1870). 1445 State Route 96. Montebello. Gothic Revival.
10. Benjamin Hambleton House (c. 1865). 1485 State Route 96. Montebello.
11. *Cyrus Felt House (c. 1834/1870s). 1601 State Route 96. Montebello. Swiss Revival.
12. Cecil Baxter House (1904). 2015 Parley Street. Nauvoo. Eastlake.
13. *House (c. 1835). 145 Young Street. Nauvoo. Greek Revival.
14. *William Darnell House (c. 1840). 1141 North County Road 2900. St. Marys. Razed.
15. *Center School (c. 1890). North County Road 1000 and East County Road 2100. Sonora. Romanesque. Razed.
16. *John Wilcox House (1827). 710 Water Street. Warsaw.
17. *House (c. 1860). 1300 Water Street. Warsaw. Altered beyond recognition.
18. *Warsaw Woolen Mill (1866). 1401 Water Street. Warsaw. Italianate.
19. *Thomas Crawford House (c. 1860). North County Road 600 and East County Road 900. Wilcox. Greek Revival. Razed.