Jefferson County, Colorado
In 2010, the center of population of Colorado was located in Jefferson County.
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.
On June 22, 1858, gold
was discovered along the South Platte River
in Arapahoe County
(in present-day Englewood
). This discovery precipitated the Pike's Peak Gold Rush
. Many residents of the mining region felt disconnected from the remote territorial governments of Kansas
, so they voted to form their own Territory of Jefferson
on October 24, 1859. The following month, the Jefferson Territorial Legislature organized 12 counties for the new territory, including Jefferson County
. Jefferson County was named for the namesake of the Jefferson Territory, Thomas Jefferson
, the principal author of the Declaration of Independence
and the nation's third president
served as the county seat
of Jefferson County. Robert Williamson Steele
of the Provisional Government of the Territory of Jefferson
from 1859 to 1861, built his home in the county at Mount Vernon
and later at Apex
The Jefferson Territory never received federal sanction, but during his last week in office, President James Buchanan
signed an act which organized the Territory of Colorado
on February 28, 1861.
That November 1, the new Colorado General Assembly
organized the 17 original counties of Colorado, including a new Jefferson County. In 1908, the southern tip of Jefferson County was transferred to Park County
, reducing Jefferson County to its present length of 54 miles (87 km). Several annexations by the City & County of Denver
and the 2001 consolidation of the City & County of Broomfield
removed the east and extreme northwestern portion of the county, respectively.
Long Scraggy Peak in the southeastern part of the county.
According to the U.S. Census Bureau
, the county has a total area of 774 square miles (2,000 km2
), of which 764 square miles (1,980 km2
) is land and 9.8 square miles (25 km2
) (1.3%) is water.
Jefferson County is one of the few counties in the United States to border as many as ten counties.
- Alderfer/Three Sisters Park
- Apex Park
- Bear Creek Lake Park
- Centennial Cone Park
- Clear Creek Canyon Park
- Coal Creek Canyon
- Crown Hill Park
- Deer Creek Canyon Park
- Elk Meadow Park
- Evergreen Lake
- Fairmount Trail
- Flying J Ranch Park
- Hildebrand Ranch Park
- Hiwan Homestead Museum
- Lair o' the Bear Park
- Lewis Meadows Park
- Lookout Mountain Nature Center
- Matthews/Winters Park
- Meyer Ranch Park
- Mount Falcon Park
- Mount Galbraith Park
- Mount Glennon
- Mount Lindo
- North Table Mountain Park
- Pine Valley Ranch Park
- Ranson/Edwards Homestead Ranch
- Reynolds Park
- Sister City Park
- South Table Mountain Park
- South Valley Park
- Standley Lake Regional Park
- Van Bibber Park
- Welchester Tree Grant Park
- White Ranch Park
- Windy Saddle Park
- Urban Trails
As of the census
of 2000, there were 527,056 people, 206,067 households, and 140,537 families residing in the county. The population density
was 683 people per square mile (264/km2
). There were 212,488 housing units at an average density of 275 per square mile (106/km2
). The racial makeup of the county was 90.59% White
, 0.89% Black
or African American
, 0.75% Native American
, 2.28% Asian
, 0.08% Pacific Islander
, 3.23% from other races
, and 2.18% from two or more races. 9.95% of the population were Hispanic
of any race.
There were 206,067 households, out of which 33.40% had children under the age of 18 living with them, 55.10% were married couples
living together, 9.10% had a female householder with no husband present, and 31.80% were non-families. 24.50% of all households were made up of individuals, and 6.30% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.03.
In the county, the population was spread out, with 25.30% under the age of 18, 8.10% from 18 to 24, 32.10% from 25 to 44, 24.90% from 45 to 64, and 9.60% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 99.00 males. For every 100 females age 18 and over, there were 96.80 males.
The median income for a household in the county was $57,339, and the median income for a family was $67,310. Males had a median income of $45,306 versus $32,372 for females. The per capita income
for the county was $28,066. About 3.40% of families and 5.20% of the population were below the poverty line
, including 5.80% of those under age 18 and 5.10% of those age 65 or over.
Government and infrastructure
Jefferson County was once a Republican stronghold, but starting with the 2008 election it has consistently voted Democratic.
Presidential elections results
Jefferson County voteby party in presidential elections
National forests and wilderness
National wildlife refuges
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- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- ^ "Centers of Population by State: 2010". United States Census Bureau. Archived from the original on January 3, 2014. Retrieved June 8, 2014.
- ^ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. pp. 168.
- ^ "An Act to provide a temporary Government for the Territory of Colorado" (PDF). Thirty-sixth United States Congress. February 28, 1861. Retrieved November 26, 2007.
- ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. February 12, 2011. Retrieved April 23, 2011.
- ^ "U.S. Census website". Retrieved March 23, 2018.
- ^ "U.S. Decennial Census". United States Census Bureau. Retrieved June 8, 2014.
- ^ "Historical Census Browser". University of Virginia Library. Retrieved June 8, 2014.
- ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved June 8, 2014.
- ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved June 8, 2014.
- ^ "U.S. Census website". United States Census Bureau. Retrieved May 14, 2011.
- ^ Dwyer-Lindgren, Laura (May 8, 2017). "Inequalities in Life Expectancy Among US Counties, 1980 to 2014". JAMA Internal Medicine. 177 (7): 1003–1011. doi:10.1001/jamainternmed.2017.0918. PMC 5543324. PMID 28492829.
- ^ "FCI Englewood Contact Information." Federal Bureau of Prisons. Retrieved on July 28, 2010.
- ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved November 26, 2020.
Last edited on 11 May 2021, at 20:07
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