Welcome to St. Clair County, located in Southwestern Illinois across the Mississippi River from St. Louis. Established in 1790, it is Illinois’ oldest county.

  • Dive into the COLLECTIONS menu, for all our public site databases, read about our newest Member Benefits, the cross-reference to “Belleville Newspaper Abstracts 1840–1940” and Mount Hope Cemetery lot books, index, and sexton’s book (burials by day). Please consider joining SCCGS and support its endeavors.
  • SCCGS preserved records of more than 40 cemeteries, churches, schools and more read about them.
  • The Quarterly surname indexes include more than a quarter million St. Clair ancestors and residents from the late 1700s–21st century. 

We gratefully acknowledge the efforts of SCCGS volunteers who preserve and publish extensive information about our ancestors’ sojourn here. Meet us at free lectures and events.

SEARCH across the entire site for your ancestors, whether rooted in the county’s early 18th century French settlements; Americans who migrated from the east coast and southern States, German, Irish and English immigrants who arrived 1830-1860s, or eastern European settlers who found new homes here at the dawn of the 20th century.

St. Clair County Genealogical Society, PO Box 431, Belleville, IL 62222-0431.
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