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Genealogy Society of Southern Illinois (GSSI)

Serving the 28 southernmost counties of Illinois: Alexander, Clay, Clinton, Edwards, Franklin, Gallatin, Hamilton, Hardin, Jackson, Jefferson, Johnson, Lawrence, Marion, Massac, Monroe, Perry, Pope, Pulaski, Randolph, Richland, Saline, St. Clair, Union, Wabash, Washington, Wayne, White, and Williamson.

Jefferson County Genealogical Society

Mt. Vernon.