Blackford County, Indiana

Founding: 1838
Parent county: Jay

Namesake: Isaac Blackford, Indiana judge
Seat: Hartford City (1838–)

Land area: 165 square miles

Population (2020): 12,112

Population (historic): 1,226 (1840); 4,122 (1860); 8,020 (1880); 17,213 (1900); 13,617 (1930)

Periods of population growth: pre-1840–1900; 1930–1970

Subdivisions: Two cities; one town; four townships

National Register listings: Four

Pre-1940 residences (estimated): 1,915 (31.7%)
Pre-1940 housing survival rate: 58.4%
Pre-1860 housing survival rate (1940): 3.2%

Farm housing in disrepair (1950): 5.2%

Nonfarm housing in disrepair (1950): 8.3%

Average farmhouse value (1930): $1,308
Average outbuilding value (1930): $1,254

Average farmhouse size (1940): 6.4 rooms
Number of farms (1920): 1,126
Average farm size (1920): 77.8 acres
Sources of settlement: Ohio and Pennsylvania

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Hartford City

Namesake: Unknown—perhaps Hartford, Connecticut

Founding: 1837 (platting); 1854 (post office); 1857 (incorporation)

Population (2020): 6,086

Population (historic): 250 (1850); 878 (1870); 5,912 (1900); 6,613 (1930)

Periods of population growth: pre-1850–1910; 1920–1970
Pre-1940 residences (estimated): 851 (28.5%)

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Outstanding Buildings

1. Thomas Markin Log House (c. 1860). 4595 North 600E. Harrison.