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

  • The Collections holds DATA, e.g., St. Mary (Belleville) church record abstracts (March 2021),
  • The Quarterly indexes 250,000+ people (nested under Publications) and  books – some now digital. These detail the county’s residents in religious events, cemeteries in which they are buried, and census, court, and vital records in which they appear.

We gratefully acknowledge the efforts of SCCGS volunteers who preserve and publish extensive information about our ancestors’ sojourn here. With pencil in hand utilize tips described at this Search link (capture the page url with data you save).

Learn more at About SCCGS, member benefits here, and events (free virtual monthly lectures).

St. Clair County Genealogical Society, PO Box 431, Belleville, IL 62222-0431.
E-mail: sccgsoffice@stclair-ilgs.org  Privacy policy and Use Agreement.
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