This section is dedicated to the pursuit of genealogical research in Colorado. We could not possibly give you every link, but this will give you some places to start. The best way to keep up with the latest genealogical research, for Colorado or any of your other research, is by joining other family historians at local events and classes. It’s a great way to connect with other family researchers to learn and share. Another place to connect is the Colorado Genealogical Society Facebook page where current articles and links related to genealogy are posted with education and learning in mind. See our FAQ page for some answers about Colorado research.

Denver Public Library

10 West 14th Avenue Parkway, Denver

The Genealogy Collection is consistently ranked among the top ten public library genealogy collections in the country. A stop here is a must! Note: The library is currently undergoing renovation. The genealogy department now has a small space on the first floor where you can go request materials from 5th floor. They are happy to have you send them an email request through their web site. Contact Genealogy Department DPL

Genealogy & Western History

Historic Photograph & Digital Collection

Colorado State Archives1313 Sherman Street, Room 120, Denver

The State Archives is only a two or three block walk from the Denver Public Library or the Hart Library. It is open only weekdays. It is cash-funded, so you should expect to pay a fee for records searches and retrievals using staff assistance. The holdings are massive, but are not totally cataloged online. You need an appointment to visit in person. See their web site for details.
Genealogy Holdings
Stephen H. Hart LibraryHistory Colorado Center, 1200 Broadway, Denver

History Colorado’s Archives collection includes books, manuscript collections, maps, newspapers, serial publications, subject collections, indexes, and more.

Online Collections

Rocky Mountain Region
17101 Huron Street, Broomfield

Free access to Ancestry Library Edition. Films no longer on file in the research room. Check the web site information for COVID related updates.

Jefferson County Public LibrariesMain Branch, 10200 West 20th Avenue, Lakewood

There are various branches, but the main library has the best genealogical holdings in the Jefferson County Library system.
Catalog and Information
Bemis Public Library6014 South Datura Street, Littleton

This south-suburban library is the Littleton city library. Its holdings including the films of the 1885 Colorado state census. Check the catalog from the main page.
Pikes Peak Library

20 N. Cascade Ave, Colorado Springs (Penrose Library)

Check Special Collections for regional history and genealogy collections.
Genealogy Holdings

Colorado Department of Public Health & Environment (Vital Records) Colorado is a closed record state. There are no indexes for these records available to the public except those done by individuals and societies.

List of Colorado County Clerks and Records (PDF)

Colorado Marriages 1858-1939 – Project of the Denver Public Library and Colorado Genealogical Society

Denver Marriage Applications Index 1940-1974 – Denver Public Library (pdf)

Colorado Divorce Index 1861-1941 – Denver Public Library (pdf)

Denver Obituary Project – Denver Public Library databases index various years of Denver Post or Rocky Mountain News

Find a County Courthouse Contact – does not have all counties shown

Colorado Municipal League – city contacts

Fairmount Heritage Foundation – a link to both Fairmount and Riverside Cemeteries

Friends of Historic Riverside Cemetery

Historic Riverside Cemetery

Fort Logan National Cemetery

Colorado Historic Cemetery Association – working on a listing of pre-1910 cemeteries in Colorado

Colorado Historic Newspapers Collection – from Colorado State Library and History Colorado

Colorado Online Historical Newspapers – The Ancestor Hunt listing of free newspapers with links

USGenWeb Archives- Colorado – various records of all kinds done by volunteers