Morgan County, Illinois

Founding: 1823
Parent county: Sangamon

Namesake: Daniel Morgan, Virginia politician
Seat: Jacksonville (1825–)

Land area: 569 square miles

Population (2020): 32,915

Population (historic): 12,714 (1830); 22,112 (1860); 31,514 (1880); 35,006 (1900); 34,240 (1930)

Periods of population growth: pre-1830–1840; 1850–1900; 1920–1940; 1950s; 1970s; 1990s

Subdivisions: Two cities; eight villages

National Register listings: 11

Pre-1940 residences (estimated): 3,761 (24.2%)
Pre-1940 housing survival rate: 47.9%
Pre-1860 housing survival rate (1940): 12.9%

Farm housing in disrepair (1950): 6.5%

Nonfarm housing in disrepair (1950): 9.2%

Average farmhouse value (1930): $2,230
Average outbuilding value (1930): $1,799

Average farmhouse size (1940): 6.1 rooms
Number of farms (1920): 2,420
Average farm size (1920): 122.8 acres
Sources of settlement: Kentucky, England, Ireland, Germany, Ohio, and Tennessee
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Jacksonville

Namesake: Andrew Jackson, U.S. president

Founding: 1825 (platting); 1825 (post office); 1840 (incorporation)

Population (2020): 17,616

Population (historic): 2,745 (1850); 9,203 (1870); 15,078 (1900); 17,747 (1930)

Periods of population growth: pre-1850–1960; 2000s
Pre-1940 residences (estimated): 2,071 (25.9%)
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Outstanding Buildings

1. John Adkins Farm (c. 1860/1905). 3033 Adkins Road. Classical Revival.
2. *Woodlawn Farm / Michael Huffaker House (1840). 1463 Gierkie Lane.
3. John Scott Farm (c. 1850). 1237 Ginder Road.
4. Oliver Coultas Farm (c. 1870). 1228 Mason Lane. Italianate.
5. George Curtis Farm (c. 1840). 2583 Old State Road. Greek Revival.
6. Jacob Strawn Farm (c. 1850). 2890 Old US Highway 36. Greek Revival.
7. Farm (c. 1900). 1751 Woodson–Winchester Road. Chateauesque.