Carroll County, Indiana

Founding: 1828
Parent county: Unorganized territory

Namesake: Charles Carroll, Maryland politician
Seat: Delphi (1828–)

Land area: 372 square miles

Population (2020): 20,306

Population (historic): 1,611 (1830); 13,489 (1860); 18,345 (1880); 19,953 (1900); 15,049 (1930)

Periods of population growth: pre-1830–1890; 1930–1980; 1990–2020

Subdivisions: One city; four cities; 14 townships

Pre-1940 residences (estimated): 2,831 (29.7%)
Pre-1940 housing survival rate: 59.6%
Pre-1860 housing survival rate (1940): 12.2%

Farm housing in disrepair (1950): 3.2%

Nonfarm housing in disrepair (1950): 4.2%

Average farmhouse value (1930): $1,619
Average outbuilding value (1930): $1,551

Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 2,075
Average farm size (1920): 94.2 acres
Sources of settlement: Ohio and Pennsylvania

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Delphi

Namesake: Delphi, Greece

Founding: 1828 (platting); 1828 (post office); 1835 (incorporation)

Population (2020): 2,961

Population (historic): 1,381 (1850); 1,614 (1870); 2,135 (1900); 1,929 (1930)

Periods of population growth: pre-1850–1880; 1890–1910; 1930–1950; 1960–1980; 1990s; 2010s
Pre-1940 residences (estimated): 546 (39.5%)

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Outstanding Buildings

1. Schneib Farm (c. 1840). 3729 Towpath Road. Adams. Razed.
2. House (c. 1860). 1764 State Route 29. Carrollton. Gothic Revival. Razed.
3. Jerome Shipley Farm (1882). 5316 West 500 South. Clay. Italianate.
4. John Hufford House (c. 1890). 3908 West 750 South. Clay. Italianate/Eastlake.
5. Mears House (1852). 6405 West 300 North. Deer Creek. Greek Revival/Gothic Revival.
6. William Whistler House (1862). 3921 West 600 North. Deer Creek.
7. Andrew McDonald House (c. 1865). 6726 Milkhouse Road. Deer Creek. Gothic Revival.
8. Frederick Raber Farm (1904–1905). 4071 State Route 218. Deer Creek. Classical Revival.
9. Adams Mill (1845–1846). 4595 South 75 East. Democrat. Greek Revival.
10. Firman House (c. 1855). 1555 East 500 South. Democrat. Italianate.
11. Isaac Heine House (c. 1875). 10790 West 1000 North. Jefferson. Italianate.
12. Gilbert Gates House (1905). 7433 West 1100 North. Jefferson. Queen Anne.
13. John Shaffer House (1873). 3847 West 200 South. Madison. Italianate.
14. House (1849). 1378 West 1050 North. Rock Creek. Greek Revival/Italianate.
15. Greenup House (1859). 9775 Bicycle Bridge Road. Tippecanoe. Italianate.

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