Genealogy Trails

Welcome to Boulder County
Colorado Genealogy Trails!

Volunteers Dedicated to Free Genealogy
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.

This county is available for adoption!

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county websites, view our Volunteer Page for all the ins and outs of becoming a host.

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Boulder County was one of the original 17 counties created by the Colorado legislature on November 1, 1861.

Boulder Courthouse

It was named after Boulder City and Boulder Creek, so named because of the abundance of boulders in the area. It retains essentially the same borders now as it was created with then, although a small portion of its southeastern corner became part of the City and County of Broomfield in 2001.

Cities, Towns and Other Populated Communities
*  Allenspark  * Altona * Ara * Arrowood * Aspen Meadows * Balarat * Bark Ranch * Big Elk Meadows
* Bonanza Mountain Estates * Boulder * Boulder Junction * Canfield * Cardinal (historical) * Caribou (historical) * Caribou City
* Coal Creek * Copperdale * Crescent * Crescent Village * Crisman * Dominion * El Vado * Eldora * Eldorado Springs * Erie
* Ferncliff * Glendale * Gold Hill * Gold Run * Gooding * Grand Island (historical) * Gunbarrel * Hessie (historical)
* Hidden Lake * Highland * Hygiene * Jamestown * Lafayette * Lake Shore Park * Lazy Acres * Leyner * Liggett
* Longmont * Louisville * Lyons * Magnolia * Maple Grove * Marnett * Marshall * Meeker Park * Miramonte* Morey
*Mountain Meadows * Nederland * Ninemile Corner * Niwot * Noland * Orodell * Paragon Estates * Peaceful Valley
* Pine Brook Hill * Pine Valley * Pinecliffe * Pleasant View Ridge * Pony Estates * Raymond * Ridgewood * Riverside
* Rock Creek * Rowena * Saint Ann Highlands * Salina * Seven Hills * Silver Springs * Silver Spruce * Springdale
* Sugarloaf * Summerville * Sunnyside * Sunset * Sunshine * Superior * Switzerland Park * Tabor * Tall Timber
* Tungsten (historical) * Valmont * Wallstreet * Ward * Whispering Pine * Wondervu

Boulder County, Colorado Data

Biographies

Birth Records

Cemeteries

Census Records

Churches

County History

Death Records

Directories

Family Bibles

Marriages / Divorces

Military

Miscellaneous Data and Books

Newspaper Items

Obituaries

Schools

Wills/Probate Records

Updates

December 2017 - Bios - 71 were added; History of Boulder County was added
November 2017 - Bios 100 were added
July 2017 - Birth Announcements 15 were added & 2 Fires/Accidents added
April 2017 - Obits - 9 were added
October 2016 - 10 obits were added
July 2016 - 1871 Boulder County Business Directory; Valmont and Burlington Directories
June 2016 - News-Fires/Accidents - 1 article added; News - Birth Announcements - Four were added; News - Marriage Announcements - 2 were added; Brief History of Boulder County
May 2016 - Bios 6
Apr 2016 - News - Fires - Boulder Woman Burned; Obit - Fred Ewing transcribed by J.S.
Feb 2016: Obits - Mary Hayden
Feb 2015: Bios: William R. Howell - submitted by Rick Evans; Census: 1880 Mortality Census, pg 3 of 7 so far; Marriages: 1863 - 1884
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Visit the Counties bordering Boulder
City and County of Broomfield
Gilpin County
Grand County
Jefferson County
Larimer County
Weld County
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