Kendall County, Illinois

Founding: 1841
Parent counties: Kane and LaSalle

Namesake: Amos Kendall, U.S. postmaster general
Seat: Oswego (1841–1859); Yorkville (1859–)

Land area: 320 square miles

Population (2020): 131,869

Population (historic): 7,730 (1850); 12,399 (1870); 11,467 (1900); 10,555 (1930)

Periods of population growth: pre-1850–1860; 1870s; 1920–2020

Subdivisions: Two cities; seven villages; one CDP; nine townships

National Register listings: 11

Pre-1940 residences (estimated): 2,124 (5.1%)
Pre-1940 housing survival rate: 66.1%
Pre-1860 housing survival rate (1940): 15.5%

Farm housing in disrepair (1950): 2.5%

Nonfarm housing in disrepair (1950): 3.7%

Average farmhouse value (1930): $2,962
Average outbuilding value (1930): $3,454

Average farmhouse size (1940): 7.7 rooms
Number of farms (1920): 1,210
Average farm size (1920): 143.7 acres
Sources of settlement: New York, Norway, Germany, and England
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Yorkville

Namesake: Unknown

Founding: 1836 (platting); 1839 (post office); 1873 (incorporation)

Population (2020): 21,533

Population (historic): 365 (1880); 413 (1900); 492 (1930)

Periods of population growth: pre-1880–2020
Pre-1940 residences (estimated): 231 (3.6%)
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Outstanding Buildings

1. *David Carter House (c. 1850). 7336 US Highway 34. Bristol. Greek Revival.
2. William Ripley Farm (c. 1875). 15450 State Route 47. Lisbon. Italianate.
3. Jerome Smith Farm (c. 1875). 10420 South Ridge Road. Na-Au-Say. Italianate.
4. *Oliver Johnson Farm (c. 1870). 4708 Wheeler Road. Na-Au-Say. Italianate.
5. Gilbert Gaylord House (c. 1865). 1542 Plainfield Road. Oswego. Italianate.
6. William Wormley House (c. 1855). 1437 State Route 31. Oswego. Greek Revival.