Jacob Claesz van Utrechtalso named by his signature Jacobus Traiectensis (born c. 1479 - dead after 1525) was a Flemish early Renaissance painter who worked in Antwerp and Lebeck.
Jacob van Utrecht's life is still very much in the dark. Research on this important Flemish artist did not start before the end of 19th century. He was probably born in Utrecht, although it is not certain. It is assumed that he became a citizen of Antwerp around 1500 and he is recorded as a "free master craftsman" of the Guild of St Luke there from 1506 to 1512.
From 1519 to 1525 he is recorded as a member of the Leonardsbruderschaft ("Leonard's Brotherhood"), a religious confraternity of merchants in Lebeck among whose ranks the leaders of the Protestant Reformation in the 1530s could be found.
From then on no traces of his life have been found.