Vermilion County, Illinois

Founding: 1826
Parent county: Clark

Namesake: The Vermilion River
Seat: Danville (1827–)

Land area: 898 square miles

Population (2020): 74,188

Population (historic): 5,836 (1830); 11,492 (1850); 30,388 (1870); 65,635 (1900); 89,339 (1930)

Periods of population growth: pre-1830–1930; 1940–1970

Subdivisions: Three cities; 18 villages; one CDP; 19 townships

Pre-1940 residences (estimated): 12,742 (35.3%)
Pre-1940 housing survival rate: 45.1%
Pre-1860 housing survival rate (1940): 6.7%

Farm housing in disrepair (1950): 8.5%

Nonfarm housing in disrepair (1950): 8.6%

Average farmhouse value (1930): $1,963
Average outbuilding value (1930): $1,562

Average farmhouse size (1940): 6.1 rooms
Number of farms (1920): 3,587
Average farm size (1920): 133.6 acres
Sources of settlement: Indiana, Ohio, Kentucky, Germany, and Pennsylvania
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Danville

Namesake: Uncertain—perhaps Danville, Virginia; or Danville, Kentucky

Founding: 1827 (platting); 1827 (post office); 1839 (incorporation)

Population (2020): 29,204

Population (historic): 503 (1840); 1,632 (1860); 7,733 (1880); 16,354 (1900); 36,765 (1930)

Periods of population growth: pre-1840–1970; 1990s
Pre-1940 residences (estimated): 6,429 (43.9%)
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