Grand Isle County, Vermont

Founding: 1805 (declared in 1802)
Parent counties: Chittenden and Franklin

Namesake: Grand Isle
Seat: North Hero (1805–)

Land area: 82 square miles

Population (2020): 7,293

Population (historic): 3,445 (1810); 3,883 (1840); 4,082 (1870); 4,462 (1900); 3,944 (1930)

Periods of population growth: pre-1810–1860; 1870s; 1890s; 1910–1930; 1960–2020

Subdivisions: One village; five towns

Pre-1940 residences (estimated): 949 (18.2%)
Pre-1940 housing survival rate: 72.2%
Pre-1860 housing survival rate (1940): 36.6%

Farm housing in disrepair (1950): 9%

Nonfarm housing in disrepair (1950): 9.2%

Average farmhouse value (1930): $2,518
Average outbuilding value (1930): $2,232
Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 501
Average farm size (1920): 66.1 acres
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North Hero

Namesake: North Hero Island

Founding: 1817 (post office)

Population (2020): 939

Population (historic): 125 (1790); 638 (1830); 601 (1870); 712 (1900); 485 (1930)

Periods of population growth: pre-1790–1810; 1820–1850; 1860–1880; 1890s; 1960–2000; 2010s
Pre-1940 residences (estimated): 192 (18.4%)
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