|Lamoille County, Vermont|
Lamoille County Superior Courthouse in Hyde Park
Location in the U.S. state of Vermont
Vermont's location in the U.S.
|Named for||Lamoille River|
|Shire Town||Hyde Park|
|• Total||464 sq mi (1,202 km2)|
|• Land||459 sq mi (1,189 km2)|
|• Water||4.9 sq mi (13 km2), 1.1%|
|• ( 2015)||25,235|
|• Density||54.6/sq mi (21.1/km2)|
|Time zone||Eastern: UTC−5/ −4|
Lamoille County // is a county located in the U.S. state of Vermont. As of the 2010 census, the population was 24,475,  making it the third-least populous county in Vermont. Its shire town ( county seat) is the municipality of Hyde Park.  The county was created in 1835 and organized the following year. 
The area was buried in a mile of ice during the ice age. When it melted partially, it created Lake Stowe. When it melted completely, the water from the lake ran out through the Lamoille River valley.
In 1972, the Lamoille Community College, along with other community colleges in Vermont, became the fifth member of the Vermont State Colleges system and was renamed Community College of Vermont.[ clarification needed]
In 2008, the state notified residents of Belvidere, Eden, Hyde Park, Johnson, Waterville and eight towns in the adjacent counties of Orleans and Franklin, that a review of health records from 1995 to 2006 had revealed that residents within ten miles (16 km) of the former asbestos mine on Belvidere Mountain had higher than normal rates of contracting asbestosis. The state and federal government continues to study this problem.  In April 2009 the Vermont Department of health released a revised study which found that all of deaths related to the asbestos mine were caused by occupational exposure. The report also concluded that people living near the mines had no increased risk of asbestos related illness than people living anywhere else in Vermont. 
In 2008, the county appeared to have disproportionate power in the legislature with the House Speaker, Shap Smith, from Morrisville, Floyd Nease, house majority leader, Senator Susan Bartlett, from Hyde Park, chair of the House Appropriations Committee, and Richard Westman, chair of the House Transportation Committee and the sole Republican. 
According to the U.S. Census Bureau, the county has a total area of 464 square miles (1,200 km2), of which 459 square miles (1,190 km2) is land and 4.9 square miles (13 km2) (1.1%) is water.  It is the second-smallest county in Vermont by area.
Lamoille County is the only county in Vermont that does not have at least one U.S. Route passing through it, although all ten of the Lamoille County towns are served by Vermont state routes.
- Orleans County — northeast
- Caledonia County — east
- Washington County — south
- Chittenden County — west
- Franklin County — northwest
|U.S. Decennial Census
1790–1960  1900–1990 
1990–2000  2010–2014 
As of the census  of 2000, there were 23,233 people, 9,221 households, and 5,984 families residing in the county. The population density was 50 people per square mile (19/km²). There were 11,009 housing units at an average density of 24 per square mile (9/km²). The racial makeup of the county was 97.31% White, 0.33% Black or African American, 0.45% Native American, 0.37% Asian, 0.03% Pacific Islander, 0.12% from other races, and 1.39% from two or more races. 0.77% of the population were Hispanic or Latino of any race. 15.7% were of English, 14.5% American, 11.9% Irish, 11.4% French, 8.7% French Canadian, 7.0% German and 5.2% Italian ancestry according to Census 2000. 95.9% spoke English and 2.4% French at home.
There were 9,221 households out of which 32.00% had children under the age of 18 living with them, 51.40% were married couples living together, 8.90% had a female householder with no husband present, and 35.10% were non-families. 25.00% of all households were made up of individuals and 8.10% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.94.
In the county, the population was spread out with 24.30% under the age of 18, 10.00% from 18 to 24, 29.90% from 25 to 44, 24.50% from 45 to 64, and 11.40% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 100.10 males. For every 100 females age 18 and over, there were 97.30 males.
The median income for a household in the county was $39,356, and the median income for a family was $44,620. Males had a median income of $30,848 versus $24,444 for females. The per capita income for the county was $20,972. About 6.40% of families and 9.60% of the population were below the poverty line, including 10.70% of those under age 18 and 8.50% of those age 65 or over.
As of the 2010 United States Census, there were 24,475 people, 10,014 households, and 6,274 families residing in the county.  The population density was 53.3 inhabitants per square mile (20.6/km2). There were 12,969 housing units at an average density of 28.3 per square mile (10.9/km2).  The racial makeup of the county was 96.7% white, 0.6% black or African American, 0.5% Asian, 0.4% American Indian, 0.3% from other races, and 1.5% from two or more races. Those of Hispanic or Latino origin made up 1.3% of the population.  In terms of ancestry, 18.3% were English, 16.5% were Irish, 10.2% were German, 7.7% were French Canadian, and 4.6% were American. 
Of the 10,014 households, 30.6% had children under the age of 18 living with them, 48.3% were married couples living together, 9.4% had a female householder with no husband present, 37.3% were non-families, and 27.3% of all households were made up of individuals. The average household size was 2.37 and the average family size was 2.87. The median age was 39.7 years. 
The median income for a household in the county was $52,232 and the median income for a family was $62,364. Males had a median income of $41,761 versus $31,250 for females. The per capita income for the county was $27,164. About 8.7% of families and 12.0% of the population were below the poverty line, including 15.0% of those under age 18 and 8.4% of those age 65 or over. 
After being formed in 1836, Lamoille County was unable of voting in that years election.
From John C. Frémont in 1856 to Richard Nixon in 1960 (barring 1912, where the county was won by Progressive Party candidate and former president Theodore Roosevelt), the Republican Party would have a 104 year winning streak in the county.
Following the Democrats victory in 1964, the county went back to voting for Republican candidates for another 20 year winning streak starting with Richard Nixon in 1968 and ending with George H. W. Bush in 1988, who became the last Republican presidential candidate to win the county.
Johnson State College is a Vermont State College located in Johnson in Lamoille County. It was established in 1828 as Johnson Academy. It was among the original colleges to come together to form the Vermont State College system.
The Community College of Vermont (CCV) is located in Morrisville in Lamoille County.
- "State & County QuickFacts". United States Census Bureau. Archived from the original on July 13, 2011. Retrieved December 30, 2013.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "Vermont: Individual County Chronologies". Vermont Atlas of Historical County Boundaries. The Newberry Library. 2008. Retrieved June 30, 2015.
- Rathke, Lisa (December 12, 2008). Neighbors worry about mine's impact on health. Burlington Free Press.
- "Overview: Asbestos in Buildings". Vermont Department of Health. 2016-07-18. Retrieved 2018-03-26.
- Remsen, Nancy (January 12, 2009). Quartet hold power positions in 2009 Legislature. Burlington Free Press.
- "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved June 29, 2015.
- "Population and Housing Unit Estimates". Retrieved June 9, 2017.
- "U.S. Decennial Census". United States Census Bureau. Retrieved June 29, 2015.
- "Historical Census Browser". University of Virginia Library. Retrieved June 29, 2015.
- Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved June 29, 2015.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved June 29, 2015.
- "American FactFinder". United States Census Bureau. Retrieved 2011-05-14.
- "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Retrieved 2016-01-20.
- "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Retrieved 2016-01-20.
- "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2016-01-20.
- "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2016-01-20.
- Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved 2018-03-26.
- National Register of Historic Places listing for Lamoille Co., Vermont
- Lamoille County description from Hayward's Gazetteer of 1839