Welcome to the Boulder County COGenweb!

Interested in volunteering for the COGenWeb Project? Boulder County is up for adoption!
Contact our state coordinator for more information.

Boulder County Courthouse

USGenWeb Logo

CoGenWeb Logo

Topo map of Boulder County

Map showing location of Boulder County

"In all of us there is a hunger, marrow-deep, to know our heritage - to know who we are and where we have come from. Without this enriching knowledge, there is a hollow yearning. No matter what our attainments in life, there is still a vacuum, an emptiness and the most disquieting loneliness." -- Alex Haley


Left: Boulder County Courthouse ca. 1900.
Photo Courtesy of Pauli Driver Smith

A Little History

Boulder County is the sixth most populous of the 64 Colorado Counties. The county seat is Boulder. The county was named for both Boulder Creek and Boulder City. Settlers arrived at Boulder Creek on October 17, 1858 and built 11 cabins at Red Rocks near the entrance of Boulder Canyon. Boulder City was organized less than a year later, on February 10, 1859. Boulder County was originally called Jackson County by the Jefferson Territorial officers who authorized nine counties in 1860. Jefferson Territory was superseded in 1861 by Colorado Territory and Jackson County was renamed Boulder County.

Surrounding counties are Adams, Broomfield, Gilpin, Grand, Jefferson, Larimer, Weld


COGenWeb State Coordinator:
Gail Kilgore

Asst. State Coordinators:
Billie Walsh
Colleen Pustola

Boulder County Coordinator:

This site was updated on August 4, 2015
                                                                                        This site was swept on 19 Jan 2012

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