Welser is a surname. Notable people with the surname include:
Bartholomeus V. Welser (c. 1475 – 1559), Augsburg merchant and banker Bartholomeus VI. Welser (1512–1546), explorer of Venezuela Carl Wilhelm Welser von Neunhof (1663–1711), mayor of Nuremberg Franz Welser-Möst (born 1960), Austrian conductor, music director of the Cleveland Orchestra Maria von Welser (born 1946), German journalist Mark Welser (1558–1614), German banker, politician, and astronomer Philippine Welser (1527–1580), morganatic wife of Ferdinand II, Archduke of Austria
Welser family, a German banking and merchant family.