Jefferson County, Florida

Founding: 1827
Parent county: Leon
Namesake: Thomas Jefferson, U.S. president
Seat: Monticello (1827–)
Land area: 598 square miles
Population (2020): 14,510
Population (historic): 3,312 (1830); 9,876 (1860); 16,065 (1880); 16,195 (1900); 13,408 (1930)
Periods of population growth: pre-1830–1880; 1890–1910; 1970–2010
Subdivisions: One city; five CDPs
National Register listings: 24
Pre-1940 residences (estimated): 446 (6.7%)
Pre-1940 housing survival rate: 4.5%
Pre-1860 housing survival rate (1940): 4.7%

Farm housing in disrepair (1950): 41.2%

Nonfarm housing in disrepair (1950): 38.8%

Average farmhouse value (1930): $493
Average outbuilding value (1930): $220

Average farmhouse size (1940): 3.7 rooms

Number of farms (1920): 1,983
Average farm size (1920): 51.5 acres
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Monticello

 
Namesake: Monticello, Thomas Jefferson's plantation
Founding: 1827 (platting); 1827 (post office); 1831 (incorporation)
Population (2020): 2,589
Population (historic): 329 (1850); 1,052 (1870); 1,218 (1890); 1,829 (1910); 1,901 (1930)
Periods of population growth: pre-1850–1860; 1880s; 1900s; 1920–1960; 1970s; 2010s
Pre-1940 residences (estimated): 205 (14.5%)
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Outstanding Buildings

1. *Lyndhurst / William Bailey Plantation (c. 1855). 69 Gum Swamp Road. Greek Revival.
2. *Rosewood / Asa May House (c. 1840). 9191 South Jefferson Highway. Greek Revival.
3. *Theodore Turnbull House (c. 1856). North end of Ritter Road.