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  • The Community of Jefferson County


    Once an agricultural and mining area, Jefferson County, Colorado is a thriving suburban, business, industrial, recreational and residential community. The county, formally organized in 1861 by the Colorado Territorial Legislature, takes the name of Thomas Jefferson, the third president of the United States.

    Life in Jeffco

    Learn more about the thriving suburban, business, industrial, recreation and residential community that is Jefferson County.

    County News

    See all the latest news from all areas of the county.

    County Events

    See all the latest events from all areas of the county.


    Jefferson County has a first-class public school sysem and at least a dozen institutions of higher education.


    Jefferson County has a history rich in people, events and progress. See the general history as well as that from our sesquicentennial.

    Job Search

    See all of the employment and volunteer opportunities within the county.


    Maps and directions for Jeffco.

    Stay Connected

    See the complete list of Jefferson County social media site, newsletters, blogs and more.

    Things to Do in Jeffco

    Explore the park and recreation districts, arts and music, museums and attractions that Jefferson County has to offer.

    Photo Galleries

    See which groups have photo galleries within their site.

    Video Galleries

    See which groups have video galleries within their site.