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The Jewish Genealogical Society (JGS) of Colorado is a leader in education, research, information exchange forums, and resources for Jewish genealogy.

Founded in 1995 by Miriam Ohr (z''l) and Sandra Greenberg, and as part of a network of 70 societies worldwide within the International Association of Jewish Genealogical Societies (IAJGS), the Society is a nonprofit and run 100% by volunteers. 

Learn More...

Are you interested in researching Jewish family history and looking for a local network of experts and enthusiasts?


We’re here to help by providing programs, support, and guidance to find and use resources located in Colorado and throughout the world. Please take a look through our website.

We encourage all levels of research from beginner to advanced to participate and share their knowledge. Take a look at the How to Get Started page where you’ll find useful information for all levels of research, and check out upcoming programs. Guests are always welcome. We meet once a month on Zoom on Sunday mornings. To help folks with their research questions, we start at 9:30 am and the guest speaker starts at 10 am, (Mountain Time) from September through June.

JGSCO is a nonprofit organization run entirely by volunteers. Annual dues of $30 per individual or $40 per household support the administration of the group including speaker and venue fees, website, and operations. Join here.

Join us at our next event

The Jewish Genealogy Society of Colorado 

Annual Meeting 

Featuring presentations on The fascinating history of Temple Aaron of Trinidad and Temple Israel of Leadville 

Two of the oldest synagogues of Colorado.

Join Marty Dubin, descendent of one of the original founders of Temple Aaron and William A.Korn President of the Temple Israel Foundation 

Sunday June 2nd 2024

Temple Emanuel  In-person only

51 Grape Street Denver

2 PM to 4 PM

Afternoon Tea 

No Charge but everyone must register 

Guests welcome


 The Temple Aaron is among the oldest synagogues in the state of Colorado and, in December 2023, was  designated as a National Historic Landmark.  Temple Aaron is one of 16 sites across the country to receive NHL designation this year. NHLs are some of the nation’s most historically important buildings and sites, and are chosen for their historical, archeological, architectural, and cultural significance.In fact, when the town incorporated in 1876, its first mayor, Sam Jaffa, was Jewish. The local Jewish community founded Congregation Aaron (named after Sam’s father) in 1883. Six years later in 1889, for the princely sum of approximately $12,000, the congregation built the magnificent red brick structure that still graces 407 South Maple Street today- Temple Aaron. It is one of less than two dozen original structures that have continuously been synagogues since the 19th century in the United States, and the second oldest such structure west of the Mississippi River.

Temple Israel of Leadville. The town of Leadville personified the classic Western American boomtown from the 1870s through WWI and into the 20th century. Populated by characters now routinely associated with the Old West.  Newly arrived Jewish immigrants also journeyed up the mountains to taste opportunities formerly denied under their oppressive countries of origin. These pioneering Jews, who reflected all strata of society in their adopted land — whether as merchants,  tradesmen, mine owners, or laborers — made new lives for themselves, their families, and contributed to America’s growing preeminence.  By 1893, Leadville had two synagogue buildings. Reform Jews built the first one in 1884, while the Orthodox Jews converted in late 1892 a former church into an Orthodox Synagogue.


Upcoming events


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Need Help Getting Started?

The Jewish Genealogy Society of Colorado offers a Q & A session during monthly meetings.  Come 30 minutes early where we discuss and offer suggestions to your genealogy questions. We have found this is a great way to help enthusiats work through their 'brick walls.' 

Some of our members may also offer private research services. Fees and type of research should be negotiated individually. Results may vary and are not guaranteed, nor does the JGS of Colorado recommend or sponsor any individual researcher.


The Jewish Genealogical Society (JGS) of Colorado is a leader in education, research, information exchange forums, and resources for Jewish genealogy.

Mailing Address

Jewish Genealogical Society of Colorado
P.O. Box 460442
Denver, Colorado 80246


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© 2024 Jewish Genealogical Society of Colorado

JGSCO is a 501(c)3 non-profit organization.