Grand Isle County is part of the Burlington-South Burlington, VT Metropolitan Statistical Area.
There were 2,761 households out of which 31.20% had children under the age of 18 living with them, 60.10% were married couples living together, 7.10% had a female householder with no husband present, and 29.20% were non-families. 22.20% of all households were made up of individuals and 8.20% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 2.93.
In the county, the population was spread out with 24.80% under the age of 18, 5.60% from 18 to 24, 28.70% from 25 to 44, 28.50% from 45 to 64, and 12.30% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 99.90 males. For every 100 females age 18 and over, there were 97.90 males.
The median income for a household in the county was $43,033, and the median income for a family was $48,878. Males had a median income of $35,539 versus $26,278 for females. The per capita income for the county was $22,207. About 5.90% of families and 7.60% of the population were below the poverty line, including 9.20% of those under age 18 and 7.90% of those age 65 or over.
Grand Isle County, Vermont, is one of several Vermont counties created from land ceded by the state of New York on January 15, 1777 when Vermont declared itself to be a distinct state from New York. The land originally was contested by Massachusetts, New Hampshire, and New Netherlands, but it remained undelineated until July 20, 1764 when King George III established the boundary between New Hampshire and New York along the west bank of the Connecticut River, north of Massachusetts and south of the parallel of 45 degrees north latitude. New York assigned the land gained to Albany County. On March 12, 1772 Albany County was partitioned to create Charlotte County, and this situation remained until Vermont's independence from New York and Britain. However, this did not end the contest.
On September 3, 1783, as a result of the signing of the Treaty of Paris the Revolutionary War ended with Great Britain recognizing the independence of the United States. Vermont's border with Quebec was established at 45 degrees north latitude, which explains why this county has no dry-land connection to the rest of the United States.
Massachusetts did not formally withdraw its claim to the region, first made in 1629, until December 16, 1786. New York, still not satisfied with the relinquishment of its land to Vermont, asked the U.S. Congress to arbitrate the matter. Congress ruled against New York on March 7, 1788
Subsequently, when Vermont petitioned for Statehood, Congress ordered a joint commission to settle the border between New York and Vermont. This commission ruled prior to Vermont's admission, which took place on March 4, 1791 but a small change they permitted has never been acted upon.
In the 2004 U.S. Presidential Election, Grand Isle County chose John Kerry over George W. Bush by 12 points, with Kerry carrying all six municipalities.http://www.uselectionatlas.org/RESULTS/statesub.php?year=2004&fips=50013&f=0&off=0&elect=0
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