Jefferson County

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Jefferson County
Jefferson County Courthouse in Golden
Jefferson County Courthouse in Golden
Motto(s): 
Gateway to the Rocky Mountains
Map of Colorado highlighting Jefferson County
Location within the U.S. state of Colorado
Map of the United States highlighting Colorado
Colorado's location within the U.S.
Coordinates: 39°35′N 105°15′W / 39.59°N 105.25°W / 39.59; -105.25
Country United States
State Colorado
FoundedNovember 1, 1861
Named forThomas Jefferson
SeatGolden
Largest cityLakewood
Area
 • Total774 sq mi (2,000 km2)
 • Land764 sq mi (1,980 km2)
 • Water9.8 sq mi (25 km2)  1.3%%
Population
 • Estimate 
(2019)
582,881
 • Density752/sq mi (290/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Congressional districts1st, 2nd, 7th
Websitewww.jeffco.us

Jefferson County, is a county located in the U.S. state of Colorado. As of the 2010 census, the population was 534,543,[1] making it the fourth-most populous county in Colorado. The county seat is Golden,[2] and the most populous city is Lakewood.

Jefferson County is included in the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area. Located along the Front Range of the Rocky Mountains, Jefferson County is adjacent to the state capital of Denver.

In 2010, the center of population of Colorado was located in Jefferson County.[3]

The county's slogan is the "Gateway to the Rocky Mountains", and it is commonly nicknamed Jeffco. The name Jeffco is incorporated in the name of the Jeffco School District, the Jeffco Business Center Metropolitan District No. 1, and several businesses located in Jefferson County. Jeffco is also incorporated in the unofficial monikers of many Jefferson County agencies. The Rocky Mountain Metropolitan Airport operated by Jefferson County was previously known as the Jeffco Airport.

A major employer in Jefferson County is the large Coors Brewing Company in Golden. Also, the state-supported Colorado School of Mines is located in Jefferson County, focusing on topics such as mining, geology, chemistry, and engineering.

  1. ^ "State & County QuickFacts". United States Census Bureau. Archived from the original on June 6, 2011. Retrieved June 8, 2014.
  2. ^ "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.
  3. ^ "Centers of Population by State: 2010". United States Census Bureau. Archived from the original on January 3, 2014. Retrieved June 8, 2014.

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Jefferson County

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