Jo Daviess County, Illinois

Founding: 1827
Parent counties: Henry, Mercer, and Putnam

Namesake: Joseph Daveiss, Indiana militiaman
Seat: Galena (1827–)

Land area: 601 square miles

Population (2020): 22,035

Population (historic): 2,111 (1830); 18,604 (1850); 27,820 (1870); 24,533 (1900); 20,235 (1930)

Periods of population growth: pre-1830–1870; 1940–1960; 1970s; 1990–2010

Subdivisions: Two cities; eight villages; two CDPs; 23 townships

National Register listings: 18

Pre-1940 residences (estimated): 4,291 (31.3%)
Pre-1940 housing survival rate: 71.7%
Pre-1860 housing survival rate (1940): 14%

Farm housing in disrepair (1950): 6.4%

Nonfarm housing in disrepair (1950): 5.9%

Average farmhouse value (1930): $2,211
Average outbuilding value (1930): $2,785

Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 2,183
Average farm size (1920): 108.3 acres
Sources of settlement: Ireland, Germany, New York, England, Pennsylvania, and Ohio
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Galena

Namesake: Lead mines near the city

Founding: 1826 (platting); 1826 (post office); 1835 (incorporation)

Population (2020): 3,308

Population (historic): 6,004 (1850); 7,019 (1870); 5,635 (1890); 4,835 (1910); 3,878 (1930)

Periods of population growth: pre-1850–1860; 1930–1950
Pre-1940 residences (estimated): 1,173 (60.3%)
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Outstanding Buildings

1. Council Hill Methodist Church (1894). 6603 Council Hill Road. Council Hill. Gothic Revival/Eastlake.
2. *William Temperly House (c. 1845). 6763 Council Hill Road. Council Hill. Razed.
3. *Derinda School (c. 1880). Hanover Road and Derinda Road. Derinda. Italianate. Razed.
4. *James Roberts Farm (1847–1848). 8481 US Highway 20. East Galena. Greek Revival.
5. *Buckhorn Tavern Ruins (c. 1835). 3835 Guilford Road. Guilford.
6. *John Rawlins Farm (c. 1855). 2835 Rawlins Road. Guilford. Greek Revival.
7. John Speer Farm (c. 1875). 6889 Blackjack Road. Hanover. Gothic Revival.
8. Martin Wishon Farm (c. 1855). 9469 State Route 78. Pleasant Valley. Greek Revival.
9. *Louis Chetlain Log House (1826/1840s). 11661 Chetlain Lane. Rawlins.
10. *Henry Miller House (c. 1850). 11672 Norris Lane. Rawlins. Italianate.
11. James Ryan House (1876). 11373 US Highway 20. Rawlins. Italianate.
12. *George Townsend Farm (1856). 117 North Canyon Park Road. Rush. Greek Revival.
13. *Charles Wenner House (1854). 9404 Rocky Road. Vinegar Hill.
14. John Finkenbinder Farm (c. 1885). 14871 Airport Road. Ward's Grove. Italianate.
15. *Sharp Farm (c. 1860). 13487 Blair Hill Road. Ward's Grove. Italianate.
16. John Cloran House (c. 1880). 1237 Franklin Street. West Galena. Italianate.