Carroll County, Maryland

Founding: 1836
Parent counties: Baltimore and Frederick
Namesake: Charles Carroll, Maryland politician
Seat: Westminster (1837–)
Land area: 448 square miles
Population (2020): 172,891
Population (historic): 17,242 (1840); 24,533 (1860); 30,992 (1880); 33,860 (1900); 35,978 (1930)
Periods of population growth: pre-1840–2020
Subdivisions: Two cities; six towns; one CDP
Pre-1940 residences (estimated): 7,226 (11.4%)
Pre-1940 housing survival rate: 81%
Pre-1860 housing survival rate (1940): 33.8%
Average farmhouse value (1930): $1,668
Average outbuilding value (1930): $1,434

Farm housing in disrepair (1950): 7.1%

Nonfarm housing in disrepair (1950): 6.1%

Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 3,518
Average farm size (1920): 59 acres
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Westminster

 
Namesake: Uncertain—perhaps Westminster, England
Founding: 1764 (platting as Winchester); 1800 (post office); 1818 (incorporation)
Population (2020): 20,126
Population (historic): 884 (1850); 2,310 (1870); 2,908 (1890); 3,295 (1910); 4,463 (1930)
Periods of population growth: pre-1850–1950; 1960–2020
Pre-1940 residences (estimated): 1,158 (15.2%)
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