Jacob Bathen or Jacob Baethen, Latinised as Jacobus Bathius, Iacobus Batius and Jacobus Bathenius (likely Leuven or Heverlee, in or before 1516 - Leuven ?, 1558), was a Flemish bookseller, printer and publisher of the 16th century, mainly known now for music publications. He is sometimes confused with (Jan or Johan) Baethen, a printer active in Leuven and Cologne between 1552 and 1562, who was likely his brother. Jacob was active in Leuven, Maastricht and Düsseldorf. He is mainly remembered for his publication of the so-called Maastricht songbook of 1554, which is one of only five surviving song books in the Dutch language from the 16th century.