Sullivan County, Indiana

Founding: 1817
Parent county: Knox

Namesake: Daniel Sullivan, Indiana militiaman
Seat: Merom (1819–1842); Sullivan (1842–)

Land area: 447 square miles

Population (2020): 20,817

Population (historic): 3,498 (1820); 10,141 (1850); 18,453 (1870); 26,005 (1900); 28,133 (1930)

Periods of population growth: pre-1820–1910; 1970s; 1990s

Subdivisions: One city; six towns; nine townships

Pre-1940 residences (estimated): 2,318 (26%)
Pre-1940 housing survival rate: 37.7%
Pre-1860 housing survival rate (1940): 7.6%

Farm housing in disrepair (1950): 10.9%

Nonfarm housing in disrepair (1950): 10.5%

Average farmhouse value (1930): $927
Average outbuilding value (1930): $524

Average farmhouse size (1940): 4.9 rooms
Number of farms (1920): 2,837
Average farm size (1920): 74.3 acres
Sources of settlement: Kentucky, Ohio, and Illinois

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Sullivan

Namesake: Sullivan County

Founding: 1842 (platting); 1843 (post office); 1853 (incorporation)

Population (2020): 4,264

Population (historic): 949 (1860); 2,161 (1880); 3,118 (1900); 5,306 (1930)

Periods of population growth: pre-1860–1930; 1940s; 1970s
Pre-1940 residences (estimated): 876 (38.8%)

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Outstanding Buildings

1. Sullivan County Infirmary (1896–1897). 1447 East 75 North. Hamilton. Romanesque.
2. Elizabeth Baldridge House (c. 1895). 5203 East 1100 North. Jackson. Shingle/Eastlake.
3. James Kelley Farm (c. 1885). 10247 West 450 North. Turman. Gothic Revival.

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