Snyder was born on November 5, 1759, in
Lancaster in the
Province of Pennsylvania. His parents were ethnic Germans. Anton Schneider and Agnesa Krämer (née Knippenberg) Schneider reared him in the
Lutheran church. His father was a mechanic, and had immigrated to Pennsylvania in 1744 from Germany, part of a large wave of immigrants from there in the 18th century. The family was for many years associated with the
Moravian Church in Lancaster, consistently listed in membership catalogs of the congregation during the 1760s and 1770s. After his father's death in 1774, when Snyder was 15, the youth became apprenticed to a tanner in
York, Pennsylvania, in order to learn a trade. He used his limited leisure time for study. In 1784, Snyder moved to
Selinsgrove, Pennsylvania, where he opened a gristmill. He was elected as justice of the peace, serving for twelve years. His residence still stands at 121 North Market Street and is now known as the
Gov. Simon Snyder Mansion; it is listed on the
National Register of Historic Places. ==Marriage and family==