County of jefferson

colorado

History & Founding

Established in 1861, the county emerged from portions of Arapahoe and Boulder counties, a period of rapid growth and settlement in the Colorado Territory. Its name honors Thomas Jefferson, the third President of the United States, reflecting the westward expansion ethos and admiration for American ideals prevalent at the time. Early settlers, drawn by the promise of gold and fertile land, faced challenging conditions and interacted with the Indigenous peoples who had long inhabited the region. A fascinating anecdote from this era involves the attempted establishment of a utopian community called "Golden City," initially envisioned as a model town based on socialist principles. While the utopian dream faded, the name Golden stuck, becoming the county seat and a symbol of the region’s pioneering spirit. The county played a vital role in Colorado’s development, contributing significantly to the state’s mining, agricultural, and later, technological advancements.

Geography & Landscape

Located just west of Denver, the county occupies a diverse landscape within the foothills of the Rocky Mountains. Covering 772 square miles, its terrain varies from rolling plains in the eastern portion to rugged mountain slopes in the west. The Clear Creek and Bear Creek rivers carve through the landscape, providing vital water resources and recreational opportunities. Numerous lakes, including Evergreen Lake and Chatfield Reservoir, dot the area. The climate is semi-arid, characterized by warm summers and cold, snowy winters. The majestic peaks of the Front Range, including Mount Evans and Lookout Mountain, dominate the western horizon, creating a stunning backdrop for the communities below. The county's elevation ranges from approximately 5,300 to over 14,000 feet, contributing to its dramatic scenery.

Economy & Communities

The county is a blend of established towns and thriving communities, including Arvada, Lakewood, Westminster, and Golden. The economy is largely driven by technology, aerospace, healthcare, and professional services. While agriculture played a significant role in the county’s early history, today it’s primarily suburban and urban, although some farming and ranching operations persist, particularly in the more rural western areas. Notable employers include St. Jude Medical, Lockheed Martin, and several healthcare providers. The area’s character is predominantly suburban, with a mix of residential neighborhoods, commercial districts, and industrial parks. The proximity to Denver contributes to the county's dynamic and diverse population.

Points of Interest

Numerous points of interest draw visitors and residents alike. The Clear Creek Canyon offers stunning views and outdoor recreation opportunities, including hiking, biking, and whitewater rafting. The Buffalo Bill Museum and Grave, perched atop Lookout Mountain, provides insights into the life and legacy of the famed frontiersman. Red Rocks Amphitheatre, a world-renowned outdoor concert venue carved into the red rock formations, hosts a variety of musical performances. The county boasts an extensive network of parks and open spaces, providing ample opportunities for outdoor enjoyment. Festivals and events, such as the Golden Harvest Festival and the Arvada Days celebration, showcase the county’s vibrant culture. The county holds the record for having the highest number of licensed breweries per capita in Colorado, a testament to its thriving craft beer scene.

Information

State
colorado
Type
County
Population
527,056
Land area
772 sq mi
Capital
Golden
Time zone
UTC-7
FIPS
08059

16 Cities

CityPopulationElevation
Lakewood144,1265,450 ft (1,661 m)
Arvada102,1535,340 ft (1,628 m)
Broomfield38,2725,400 ft (1,646 m)
Wheat Ridge32,9135,410 ft (1,649 m)
Ken Caryl30,8875,760 ft (1,756 m)
Columbine24,0955,560 ft (1,695 m)
Golden17,1595,674 ft (1,729 m)
Evergreen9,2167,040 ft (2,146 m)
Applewood7,1235,800 ft (1,768 m)
Edgewater5,4455,353 ft (1,632 m)
Genesee3,6997,650 ft (2,332 m)
Indian Hills1,1976,844 ft (2,086 m)
Kittredge9546,805 ft (2,074 m)
Aspen Park8748,142 ft (2,482 m)
Mountain View569-
Morrison4305,762 ft (1,756 m)

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