Washington County, Maryland

Founding: 1776
Parent county: Frederick
Namesake: George Washington, U.S. president
Seat: Hagerstown (1776–)
Land area: 458 square miles
Population (2020): 154,705
Population (historic): 15,822 (1790); 28,850 (1840); 34,712 (1870); 45,133 (1900); 65,882 (1930)
Periods of population growth: pre-1790–2020
Subdivisions: One city; eight towns; 55 CDPs
Pre-1940 residences (estimated): 13,169 (21.3%)
Pre-1940 housing survival rate: 74.6%
Pre-1860 housing survival rate (1940): 36.5%

Farm housing in disrepair (1950): 8.9%

Nonfarm housing in disrepair (1950): 6.5%

Average farmhouse value (1930): $1,981
Average outbuilding value (1930): $1,553

Average farmhouse size (1940): 7.1 rooms

Number of farms (1920): 2,544
Average farm size (1920): 74.6 acres
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Hagerstown

 
Namesake: Jonathan Hager, owner of the city site
Founding: 1762 (platting as Elizabethtown); 1792 (post office); 1813 (incorporation)
Population (2020): 43,527
Population (historic): 2,670 (1820); 3,879 (1850); 5,779 (1870); 13,591 (1900); 30,851 (1930)
Periods of population growth: pre-1820–1960; 1980–2020

Pre-1940 residences (estimated): 6,288 (34%)
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