Grundy County, Illinois

Founding: 1841
Parent county: LaSalle

Namesake: Felix Grundy, Tennessee politician
Seat: Morris (1842–)

Land area: 418 square miles

Population (2020): 52,533

Population (historic): 3,023 (1850); 14,938 (1870); 21,024 (1890); 24,162 (1910); 18,678 (1930)

Periods of population growth: pre-1850–1910; 1920s; 1940–2020

Subdivisions: One city; 15 villages; 17 townships

National Register listings: Seven

Pre-1940 residences (estimated): 2,889 (13.9%)
Pre-1940 housing survival rate: 54.6%
Pre-1860 housing survival rate (1940): 8.6%

Farm housing in disrepair (1950): 2.8%

Nonfarm housing in disrepair (1950): 4.1%

Average farmhouse value (1930): $1,978
Average outbuilding value (1930): $2,850

Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 1,506
Average farm size (1920): 149.4 acres
Sources of settlement: New York, Ireland, England, Norway, Germany, Ohio, and Pennsylvania
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Morris

Namesake: Isaac Morris, county commissioner

Founding: 1842 (platting); 1842 (post office); 1853 (incorporation)

Population (2020): 14,163

Population (historic): 2,105 (1860); 3,486 (1880); 4,273 (1900); 5,568 (1930)

Periods of population growth: 1842–1880; 1890–1910; 1920–2020
Pre-1940 residences (estimated): 971 (15.6%)
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Outstanding Buildings

1. *Samuel Holderman House (c. 1870). 2545 Collins Road. Goose Lake. Italianate.
2. *William Hoge House (c. 1845). 7970 Pioneer Road. Nettle Creek.
3. *Samuel Hoge House (c. 1870). 4140 US Highway 6. Nettle Creek. Italianate.
4. William Starr Farm (c. 1870). 5050 US Highway 6. Nettle Creek. Italianate.
5. Perry Gass House (c. 1875). 5495 DuPont Road. Norman. Italianate.
6. *Charles Burroughs Farm (c. 1865). Shabbona Road, east of Gonnam Road. Norman. Italianate. Razed.
7. *Johnson House (c. 1860). State Route 47, south of Granville Road. Saratoga. Greek Revival/Italianate. Razed.
8. *John Carlon House (c. 1875). 3800 Dwight Road. Wauponsee. Gothic Revival. Razed.