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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. 

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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

  • Inside America's Alligator Family:  The David Crystal Story

  • Join us in-person for two information-packed programs rolled into one!

    Stories behind IZOD-Lacoste and The Family That Made The Alligator Logo a Cultural Phenomenon


    Speaker Ellen Kowitt 

    Sunday October 29, 2023 

    10:00 AM to 12:00 PM Mountain Time

    Location:  BMH/BJ 

    Main Foyer to Synagogue 

    560 S Monaco Parkway, Denver, CO 80224

    Refreshments during schmooze time at 9:30

     Bagels and Babka

        • Learn about the immigrant orphan David Crystal from Jedwabne, Russian Empire (now Poland) and his garment district success manufacturing clothing for seven decades.  You’ve heard about and maybe worn alligator-logo polo shirts, but The David Crystal Companies were trendsetting in so many ways!  As visible participants in New York City’s Jewish social scene, behind-the scenes drama within this family-run business will entertain and inform how secrets, silence, and storytelling can alter the narrative depending on who’s telling it.

          PLUS:  Tips from the Trenches:  Researching, Writing and Producing a Family History 

          Ellen’s story producing a family history book that involved extensive research, narrative writing, and production.  Learn how she pulled all elements together to identify themes and built a very large family tree through interviews with extended family and business employees, utilizing, newspapers, JewishGen, JRI-Poland, the Polish State Archives, Historical Vital Records NYC, professional genealogists in Poland and Canada, Russian-language translators, a citation expert, a production partner to assist with proofreading, layout, design, cleaning up images, generating an idea, and more!

          Bio:  Ellen Kowitt is a past president of JGSCO and current volunteer Director of the JewishGen USA Research Division.  She publishes articles in Family Tree Magazine, lectures Frequently, and condo t professional genealogy work.  As founder and principal genealogist at Sole Searching Genealogy & Historical Research, Ellen specializes in American records and Jewish ancestry.  She received her B.A. from Alfred University and spent twenty-five years working in marketing management and communications before transitioning into full-time research.  Ellen has completed ProGen and several genealogical institutes and she i a member of the Colorado Chapter of Association of Professional Genealogists.  Originally from New York, Ellen rises in Erie, Colorado with her Israeli-born husband and two teenage daughter.  For more information, visit


        This event is open to everyone at no charge 

        Everyone must register at

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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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© 2023 Jewish Genealogical Society of Colorado

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