Vitus "Veit" Bach (around 1550 Pozsony ? Kingdom of Hungary – 8 March 1619, Wechmar) was a German baker and miller who, according to Johann Sebastian Bach, founded the Bach family, which became one of the most important families in musical history.

Veit's son, Johannes Bach I (ca. 1580–1626), was the grandfather of Johann Ambrosius Bach, J.S. Bach's father, Veit therefore being Johann Sebastian's great-great-grandfather. Other theories hold that a different Veit Bach who died before 1578 in Erfurt was the father of Johann(es)/Hans, so was Johann Sebastian's great-great-grandfather.

Evading religious persecution in the Kingdom of Hungary, then under the control of the staunchly Roman Catholic Habsburgs, Bach, being a Protestant, settled in Wechmar, a village in the German state of Thuringia. His descendants continued to live there until Christoph Bach, grandfather of J. S. Bach, moved to Erfurt to take up a position as municipal musician or Stadtpfeifer (town piper). Bach's son Johannes Bach studied music with the town's head piper.^{[citation needed]}