About Jefferson County, Colorado

Once an agricultural and mining area, Jefferson County, Colorado now is a thriving suburban, business, industrial and residential community.

It’s a place where the great plains meet the Rocky Mountains with some of the most magnificent scenery in the country. We have rolling grasslands and craggy rock formations, natural foothills, rugged mountains and tumbling mountain streams.

Jefferson County is a place filled with magnificent wonders only nature can provide. Not ignoring its agricultural and mining roots, Jefferson County has worked to create a delicate balance between that past while supporting a thriving business community and providing for safe neighborhoods.

Jefferson County is the second largest county in Colorado with a population estimated at 535,837, according to the Denver Regional Council of Governments.

Jeffco citizens make their homes on mountain tops as well as in suburban communities. Outdoor lovers have three national forests and two state parks to choose from.

Located partly in Jefferson County are Pike, Roosevelt and Arapahoe national forests, and Golden Gate Canyon State Park and the Chatfield State Recreation Area.

The nationally recognized Open Space program in Jefferson County offers a variety of outdoor activities.

Jefferson County Colorado cities include:

Arvada

Arvada, Colorado is an attractive western suburb with an estimated population of 107,050 that maintains its cherished hometown feel while building a diverse business community. From the rich historical culture to the shared community pride, Arvada combines the luxuries of