According to Houbraken he was born in Delft as a descendant of an old line of Vosmeers. He started his career as a landscape specialist, but switched to flowers, which brought him more success. 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. He died in Delft in 1641.
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. He became a member of the Delft Guild of St. Luke before 1613, where he was a pupil of Jacob de Gheyn II. He later taught his nephews Daniel Vosmaer and Abraham Vosmeer, and the Dane Jakob Mogensen or Ebbe Ulfeldt. He was the uncle of Christiaen van Couwenbergh. No known landscapes by his hand survive.
|Wikimedia Commons has media related to Jacob Vosmaer.|
- Vermeer and The Delft School, a full text exhibition catalog from The Metropolitan Museum of Art, which contains material on Jacob Vosmaer