Gish was born on October 14, 1893 in Springfield, Ohio, to 18-year-old Mary Robinson McConnell (1875-1948) (an Episcopalian) and James Leigh Gish (1872-1912) (who was of German Lutheran descent). She had a younger sister, Dorothy.

The first several generations of Gishes were Dunkard ministers. Her great-great-great-grandfather came to America on the ship Pennsylvania Merchant in 1733 and received a land grant from William Penn. Her great-great-grandfather was in the American Revolutionary War and is buried in a cemetery in Pennsylvania for such soldiers.

Lillian Gish's Family Tree