Adair County, Kentucky

Founding: 1802
Parent county: Green

Namesake: John Adair, Kentucky governor
Seat: Columbia (1802–)

Land area: 405 square miles

Population (2020): 18,903

Population (historic): 6,011 (1810); 8,466 (1840); 11,065 (1870); 14,888 (1900); 16,401 (1930)

Periods of population growth: pre-1810–1820; 1830–1850; 1860–1920; 1930s; 1970–2020

Subdivisions: One city

Pre-1940 residences (estimated): 627 (7.3%)
Pre-1940 housing survival rate: 20.9%
Pre-1860 housing survival rate (1940): 11.9%

Farm housing in disrepair (1950): 27.2%

Nonfarm housing in disrepair (1950): 24.7%
Average farmhouse value (1930): $327
Average outbuilding value (1930): $181
Average farmhouse size (1940): 4.5 rooms
Number of farms (1920): 2,930
Average farm size (1920): 47.1 acres
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Columbia

Namesake: A traditional name

Founding: 1802 (platting); 1806 (post office); 1893 (incorporation)

Population (2020): 4,845

Population (historic): 175 (1810); 486 (1840); 506 (1870); 654 (1900); 1,195 (1930)

Periods of population growth: pre-1810–2020
Pre-1940 residences (estimated): 245 (12.3%)
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