Jacob Vosmaer (1584, Delft - 1641, Delft) was a Dutch Golden Age painter.
According to Houbraken he was born in Delft as a descendant of an old line of Vosmeers.[1] According to the RKD he was the son of the Delft gold- and silversmith Wouter Vosmaer, and the brother of the silversmith Arent Woutersz Vosmaer.[2]
He started his career as a landscape specialist, but switched to flowers, which brought him more success.[1] He visited Italy as a young man and returned to Delft in 1608 at the age of 24, where he remained and became a respected citizen, and major in the schutterij.[1]
He became a member of the Delft Guild of St. Luke before 1613, where he was a pupil of Jacob de Gheyn II.[2] He later taught his nephews Daniel Vosmaer and Abraham Vosmeer, and the Dane Jakob Mogensen or Ebbe Ulfeldt.[2] He was the uncle of Christiaen van Couwenbergh.[2] No known landscapes by his hand survive.[2]
He died in Delft in 1641.[1]