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Vítáme Vás! (We welcome you!)

Research and connect with families from the Czech and Slovak ancestral lands.

CGSI focuses on the areas of present-day Czech Republic and Slovakia. This includes Czech (Bohemian), German-Bohemian (Böhmisch), Hungarian, Jewish, Moravian, Rusyn (Ruthenian), Silesian, and Slovak ancestry.

CGSI has over 2,000 members residing in the United States, Canada, Czech Republic, Slovakia, and other countries, providing a vast networking opportunity to learn and share information, and connect with fellow members.

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Czechoslovak Genealogical Society International (CGSI) wants to help you research and connect with your family history.

We are dedicated to genealogical research and interest in descendants of ethnic groups with roots from the Czech and Slovak ancestral lands of Central Europe.

Czech and Slovak Republic (Outlines with Maps)
Sections

What Members Say

Brno, Moravia
I credit CGSI for being able to access and decipher the records of my ancestors, as I found such helpful articles in your archives after joining - I will be forever grateful to your organization for that!
Jody D., Kennebunk, Maine, USA

News & Events

Novinky E-Newsletter: February 2026

Check out CGSI's monthly electronic newsletter.

What's New at CGSI.org?

To ensure all members are aware of new items posted at CGSI.org, in our digital library or other valuable resources, a new page - What's New will provide a listing a newly published member resources.  The page is…

Now available to EVERYONE at CGSI.org: Sokol Americky

Over 1,400 issues Sokol Americky from 1879 - current, the monthly journal of the American Sokol organization are now available at CGSI.org - digitized and text searchable.
Apr
19

Czech-Slovak Cultural Festival | Omaha, NE

Presented by the Omaha Czech/Slovak Cultural ClubThe Beardmore Event Center, 3750 Raynor Parkway, Bellevue, NENoon - 5pm: Czech Dinners - Roast Pork, Czech Roast Chicken and Halusky BowlProgram11:30 am - Accordion Jamboree12:45 pm -…
Apr
24

Czech and Slovak Studies Workshop 2026 | Lincoln, NE

Held at UNL this year, 2026 Czech and Slovak Studies Workshop which will feature panels of faculty and graduate students on a wide variety of topics. The event will begin in the evening on April 23 with a panel on “Bohemian Jewishness:…
May
02

CGSI Czech & Slovak Research Discussion Group (online event)

The CGSI Czech & Slovak Research Discussion Group meets online to share resources and discoveries among members. Moderated by CGSI Education Chair Iveta Blahútová. Please join us!
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