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.

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)

What Members Say

Brno, Moravia
In a short time my membership in CGSI has paid off big time.
Ron B., Garland, Texas, USA

News & Events

CGSI 2022 Annual Membership Meeting & Election of Officers (Online Event)
Please join CGSI at 10 AM Central on Saturday, May 21, 2022 for "Our Ukrainian Cousins: Understanding Cultural & Historical Ties  Across…
Recordings of two presentations given as part of the "The Roots of Medicine" CGSI webinar on February 26, 2022 are now available for on-demand viewing by members.

Sokol San Francisco Celebrates "Day of Czech Culture" (festival)

Sokol San Francisco celebrates "Day of Czech Culture" in Orinda, California. Make plans to join us!

TCHCC Heritage Fest & Muziky (festival)

Texas Czech Heritage & Cultural Center (TCHCC) invites you to its Heritage Fest & Muziky celebration this fall in La Grange, Texas.

8th Annual Virginia Czech & Slovak Folklife Festival (festival)

Virginia's Czech & Slovak Festival returns! October 15th from 11am-4pm. Join us in celebrating a storied part of our regional heritage!