|Summit County, Utah|
Summit County Courthouse in Coalville
Location within the U.S. state of Utah
Utah's location within the U.S.
SUMMIT COUNTY UTAH Latitude and Longitude:
|Named for||The summits of the mountains|
|Largest city||Park City|
|• Total||1,882 sq mi (4,874 km2)|
|• Land||1,872 sq mi (4,848 km2)|
|• Water||10 sq mi (26 km2), 0.5%|
|• ( 2017)||41,106 |
|• Density||22/sq mi (8/km2)|
|Time zone||Mountain: UTC−7/ −6|
Summit County is a county in the U.S. state of Utah, occupying a rugged and mountainous area. As of the 2010 census, the population was 36,324.  Its county seat is Coalville,  and the largest city is Park City. The county was created in 1854 and later organized in 1861.  It is so named because it includes 39 of the highest mountain peaks in Utah.
The county's mean elevation is 8,388 feet (2,557 m) above sea level, which is the second-highest (after Taos County, New Mexico) of any county outside Colorado.  Owing to its proximity to Salt Lake City, Park City has acquired a reputation as an upscale getaway, bringing new development to the area.
- Rich County (north)
- Morgan County (northwest)
- Salt Lake County (west)
- Wasatch County (south)
- Duchesne County (south)
- Daggett County (east)
- Sweetwater County, Wyoming (northeast)
- Uinta County, Wyoming (north)
|U.S. Decennial Census
1790–1960  1900–1990 
1990–2000  2010–2014 
As of the census  of 2000, there were 29,736 people, 10,332 households, and 7,501 families residing in the county. The population density was 16 people per square mile (6.2/km2). There were 17,489 housing units at an average density of 9 per square mile (3.5/km2). The racial makeup of the county was 91.80% White, 0.24% Black or African American, 0.31% Native American, 0.96% Asian, 0.04% Pacific Islander, 5.43% from other races, and 1.21% from two or more races. 8.09% of the population were Hispanic or Latino of any race.
There were 10,332 households out of which 40.80% had children under the age of 18 living with them, 63.50% were married couples living together, 6.20% had a female householder with no husband present, and 27.40% were non-families. 18.40% of all households were made up of individuals and 3.20% had someone living alone who was 65 years of age or older. The average household size was 2.87 and the average family size was 3.30.
The median income for a household in the county was $64,962, and the median income for a family was $72,510. Males had a median income of $47,236 versus $28,621 for females. The per capita income for the county was $33,767. Only 42.9% are natives of Utah. 5.40% of the population and 3.00% of families were below the poverty line.
According to a 2000 survey by the "Association of Statisticians of American Religious Bodies, Summit County is much more diverse in religious belief than Utah as a whole. Fully two in five people (44.2%) of the population claim no religion at all while among those that do, The Church of Jesus Christ of Latter-day Saints (LDS Church) make up the largest group at 36.8% (compared with some 66% statewide), followed by Roman Catholics at 10.6%.
Summit County has traditionally been a Republican stronghold. In recent years, however, it has become more competitive, and Democrats have at times won a plurality or even a majority of the votes. Although George W. Bush carried the county in 2000 and 2004, his performance there was his worst in the state. In a 2006 U.S. Senate race, Summit County was the only county carried by Democrat Pete Ashdown even as the Republican incumbent Orrin Hatch carried the state as a whole by a 2 to 1 margin. Likewise, in the 2008 U.S. Presidential election, Barack Obama carried the county by a 15.3% margin over John McCain, while McCain carried Utah by 28.1% over Obama.  However, in the 2012 presidential election, Republican Mitt Romney defeated Obama in the county, 51% to 46%.  In 2016, Democrat Hillary Clinton defeated Republican Donald Trump, 50.3% to 36%. 
In the 2016 Senate race, Summit County was the only county in Utah where a plurality voted for Democratic nominee Misty Snow, who was the first major-party transgender Senate candidate in United States history, thereby making the county the first in the nation to vote for a transgender candidate for the Senate.
On the county level, most of the elected offices are held by Democrats; including four of the five seats on the newly created Summit County Council.  -John Hanrahan, D; Claudia McMullin, D; Sally Elliott, D; Chris Robinson, D; David Ure, R
Summit County was one of only two counties (along with Grand County) to vote against Utah's same-sex marriage ban in 2004. In June 2010, Summit County became the sixth local government of Utah to prohibit discrimination in employment or housing based on a person's sexual orientation or gender identity. 
- List of counties in Utah
- National Register of Historic Places listings in Summit County, Utah
- Utah Transfer of Public Lands Act
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- "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved 2011-06-07.
- "Utah: Individual County Chronologies". Utah Atlas of Historical County Boundaries. The Newberry Library. 2008. Retrieved June 26, 2015.
- Mean County Elevation Lists
- "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved June 25, 2015.
- "Population and Housing Unit Estimates". Retrieved June 9, 2017.
- "U.S. Decennial Census". United States Census Bureau. Archived from the original on May 12, 2015. Retrieved June 25, 2015.
- "Historical Census Browser". University of Virginia Library. Retrieved June 25, 2015.
- Forstall, Richard L., ed. (June 25, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved March 27, 2015.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved June 25, 2015.
- "American FactFinder". United States Census Bureau. Retrieved 2011-05-14.
- U.S. Election Atlas
- "President - Live Election Results - NYTimes.com". The New York Times. Retrieved 2018-03-31.
- Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved 2018-03-31.
- Summit County Democrats Archived April 6, 2009, at the Wayback Machine
- Winters, Rosemary (June 17, 2010), "Summit County bans anti-gay discrimination", Salt Lake Tribune, archived from the original on October 15, 2011, retrieved 2010-06-18
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