|Weston County, Wyoming|
Weston County Courthouse in Newcastle
Location in the U.S. state of Wyoming
Wyoming's location in the U.S.
|• Total||2,400 sq mi (6,216 km2)|
|• Land||2,398 sq mi (6,211 km2)|
|• Water||1.9 sq mi (5 km2), 0.08%|
|• ( 2016)||7,236|
|• Density||3.0/sq mi (1.2/km2)|
|Time zone||Mountain: UTC−7/ −6|
Weston County was named for Jefferson B. Weston, who was a geologist and surveyor.  In 1887, Jefferson Weston and Frank Mondell found rich coal deposits north of Newcastle which caused a railroad to be built through the area.
According to the U.S. Census Bureau, the county has a total area of 2,400 square miles (6,200 km2), of which 2,398 square miles (6,210 km2) is land and 1.9 square miles (4.9 km2) (0.08%) is water. 
- Crook County (north)
- Lawrence County, South Dakota (northeast)
- Pennington County, South Dakota (east)
- Custer County, South Dakota (southeast)
- Niobrara County (south)
- Converse County (southwest)
- Campbell County (west)
- U.S. Highway 16
- U.S. Highway 20
- U.S. Highway 85
- Wyoming Highway 116
- Wyoming Highway 450
- Wyoming Highway 585
|U.S. Decennial Census
1870–2000  2010–2016 
As of the census  of 2000, there were 6,644 people, 2,624 households, and 1,868 families residing in the county. The population density was 3 people per square mile (1/km²). There were 3,231 housing units at an average density of 1 per square mile (1/km²). The racial makeup of the county was 95.94% White, 0.12% Black or African American, 1.26% Native American, 0.20% Asian, 0.02% Pacific Islander, 0.93% from other races, and 1.54% from two or more races. 2.06% of the population were Hispanic or Latino of any race. 33.0% were of German, 13.0% English, 8.9% Irish and 7.2% American ancestry.
There were 2,624 households out of which 31.10% had children under the age of 18 living with them, 60.40% were married couples living together, 7.30% had a female householder with no husband present, and 28.80% were non-families. 25.00% of all households were made up of individuals and 11.50% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.88.
In the county, the population was spread out with 24.10% under the age of 18, 7.40% from 18 to 24, 26.30% from 25 to 44, 26.70% from 45 to 64, and 15.60% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 103.10 males. For every 100 females age 18 and over, there were 103.80 males.
The median income for a household in the county was $32,348, and the median income for a family was $40,472. Males had a median income of $34,321 versus $18,640 for females. The per capita income for the county was $17,366. About 6.30% of families and 9.90% of the population were below the poverty line, including 11.30% of those under age 18 and 13.60% of those age 65 or over.
As of the 2010 United States Census, there were 7,208 people, 3,021 households, and 1,957 families residing in the county.  The population density was 3.0 inhabitants per square mile (1.2/km2). There were 3,533 housing units at an average density of 1.5 per square mile (0.58/km2).  The racial makeup of the county was 95.5% white, 1.3% American Indian, 0.3% black or African American, 0.3% Asian, 0.9% from other races, and 1.7% from two or more races. Those of Hispanic or Latino origin made up 3.0% of the population.  In terms of ancestry, 31.7% were German, 19.3% were Irish, 18.5% were English, 6.6% were Norwegian, 6.1% were Swedish, and 5.6% were American. 
Of the 3,021 households, 26.1% had children under the age of 18 living with them, 53.2% were married couples living together, 6.9% had a female householder with no husband present, 35.2% were non-families, and 29.9% of all households were made up of individuals. The average household size was 2.28 and the average family size was 2.81. The median age was 42.3 years. 
The median income for a household in the county was $53,853 and the median income for a family was $63,438. Males had a median income of $53,095 versus $28,724 for females. The per capita income for the county was $28,463. About 5.8% of families and 7.9% of the population were below the poverty line, including 10.1% of those under age 18 and 10.1% of those age 65 or over. 
- Newcastle (county seat)
Like all of the High Plains, and almost all of Wyoming, Weston County is overwhelmingly Republican. Since Wyoming statehood in 1890, it has been carried by a Democrat just three times. Woodrow Wilson carried the county in 1912 as a result of a split between the conservative incumbent William Howard Taft and Progressive ex-President Theodore Roosevelt, whilst in his two 1930s landslides Franklin D. Roosevelt became the other Democrat to win Weston County, although he defeated Republican Alf Landon in 1936 by just 109 votes.
Subsequent to Lyndon Johnson losing the county to Barry Goldwater by just fifty-four votes in 1964, no Democrat has passed 35 percent of Weston County's vote. Indeed, Bill Clinton in 1996 was the last to pass twenty percent for the Democratic Party, and his wife Hillary lost Weston – and most High Plains counties – by worse than a ten-to-one margin in 2016 against Donald Trump.
The Wyoming Department of Corrections Wyoming Honor Conservation Camp & Boot Camp is located in Newcastle.   The facility was operated by the Wyoming Board of Charities and Reform until that agency was dissolved as a result of a state constitutional amendment passed in November 1990. 
- "State & County QuickFacts". United States Census Bureau. Retrieved January 25, 2014.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- Long, John H. (2006). "Wyoming: Individual County Chronologies". Wyoming Atlas of Historical County Boundaries. The Newberry Library. Archived from the original on 2011-07-18. Retrieved 2011-09-06.
- Urbanek, Mae (1988). Wyoming Place Names. Missoula, MT: Mountain Press Publishing Company. ISBN 0-87842-204-8.
- "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved August 18, 2015.
- "Population and Housing Unit Estimates". Retrieved June 9, 2017.
- "U.S. Decennial Census". United States Census Bureau. Retrieved August 18, 2015.
- "Historical Decennial Census Population for Wyoming Counties, Cities, and Towns". Wyoming Department of Administration & Information, Division of Economic Analysis. Retrieved January 25, 2014.
- "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 2016-01-12.
- "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Retrieved 2016-01-12.
- "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2016-01-12.
- "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2016-01-12.
- Dave Leip's U.S. Election Atlas; 2016 Presidential General Election Results – Weston County, WY (and earlier years)
- " Contact Institutions." Wyoming Department of Corrections. Retrieved on August 22, 2010.
- " Newcastle city, Wyoming[ permanent dead link]." U.S. Census Bureau. Retrieved on December 12, 2010.
- " About the Department of Corrections." Wyoming Department of Corrections. Retrieved on August 22, 2010.
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