Welcome to Jefferson County
Colorado Genealogy Trails!

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Our goal is to help you track your ancestors through time by transcribing genealogical and historical data and placing it online for the free use of all researchers.

Jefferson County is the fourth most populous county of the State of Colorado.

The county seat is Golden and the most populous city is Lakewood.

Jefferson County was was formally organized in 1861 by the Colorado Territorial Legislature
and named after U.S. President Thomas Jefferson. 

Read the history of Jefferson County

Jefferson County Map

Arvada (mostly) * Edgewater * Golden * Lakewood * Littleton (partially) * Westminster (partially) * Wheat Ridge

Bow Mar * Lakeside * Morrison * Mount Vernon * Mountain View * Ralston * Resort * Semper * South Platte * Superior (partially)

Census-designated places
Applewood  * Aspen Park  * Columbine  * Conifer  * East Pleasant View  * Evergreen
 * Genesee  * Indian Hills  * Ken Caryl  * Kittredge  * West Pleasant View

Jefferson County, Colorado Data


Birth Records


Census Records

County Records

County History

Death Records


Family Bibles

Marriages / Divorces


Miscellaneous Data and Books

Newspaper Items



Wills/ Probate Records


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