Whiteside County, Illinois

Founding: 1839 (declared in 1836)
Parent counties: Henry and Jo Daviess

Namesake: Samuel Whiteside, Illinois militiaman
Seat: Lyndon (1839–1841); Sterling (1841–1857); Morrison (1857–)

Land area: 684 square miles

Population (2020): 55,691

Population (historic): 2,514 (1840); 18,737 (1860); 30,885 (1880); 34,710 (1900); 39,019 (1930)

Periods of population growth: pre-1840–1880; 1890s; 1910–1980; 1990s

Subdivisions: Five cities; six villages; one CDP; 22 townships

Pre-1940 residences (estimated): 5,998 (23.2%)
Pre-1940 housing survival rate: 58.6%
Pre-1860 housing survival rate (1940): 16.8%

Farm housing in disrepair (1950): 6%

Nonfarm housing in disrepair (1950): 7.5%

Average farmhouse value (1930): $2,185
Average outbuilding value (1930): $2,764

Average farmhouse size (1940): 7.3 rooms
Number of farms (1920): 2,789
Average farm size (1920): 132.5 acres
Sources of settlement: New York, Pennsylvania, Germany, Ireland, and Ohio
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Morrison

Namesake: Charles Morrison, New York merchant

Founding: 1855 (platting); 1857 (post office); 1867 (incorporation)

Population (2020): 4,085

Population (historic): 1,981 (1880); 2,308 (1900); 3,067 (1930)

Periods of population growth: pre-1880–1980; 1990s
Pre-1940 residences (estimated): 636 (34.9%)
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Outstanding Buildings

1. Samuel Baird Farm (c. 1870). 15509 Habben Road. Hopkins. Italianate.
2. Stone School (c. 1875). 18985 Freeport Road. Jordan. Italianate.
3. Frank Pfundstein Farm (c. 1895). 20213 Hickory Hills Road. Jordan. Queen Anne.
4. Whiteside County Infirmary (1870). 18819 Lincoln Road. Mount Pleasant. Italianate. Razed.
5. James Robertson Farm (c. 1860). 14278 Robertson Road. Mount Pleasant. Gothic Revival.
6. House (c. 1850). 13895 Howard Road. Portland. Greek Revival.
7. Annan Mill (1858–1859). 13909 Lincoln Road. Union Grove.

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