Jacobus Trigland (Triglandius) (22 July 1583 – 5 April 1654) was a Dutch Reformed theologian. After the Synod of Dort of 1618-19, he worked and wrote against the Remonstrants.
He was born at Vianen to Roman Catholic parents. Brought up by relatives at Gouda, he was sent, in 1597, to some priests at Amsterdam to study theology. Toward the end of 1598 he went to Leuven where doubts arose in his mind which ultimately led him to break with Catholicism. He was entrusted with a mission to Haarlem by the head of the Collegium Pontificium, and never returned to Leuven. After a few weeks at Gouda, where his foster relations rejected him, he sought refuge in the house of his parents, where he studied Reformed tenets, meanwhile seeking occupation to gain his livelihood.
In 1602 he was made rector of the school at Vianen, and in the following year entered the Reformed Church. Having prepared privately for the ministry, he was ordained pastor at Stolwijk in 1607; and was pastor at Amsterdam, from 1610. Here, in 1614, he became involved in affairs of Church and state which ended only with his death. In 1617 he received leave of absence to the Reformed church at The Hague, and was a deputy of the provincial synod of North Holland to the Synod of Dort, which appointed him a member of the committee to draw up the Canons of Dort.
Trigland was professor of theology at the University of Leiden, succeeding André Rivet in 1633. He lectured on the exegesis of the Old Testament, on the Loci Communes, 1639–50, and later on cases of conscience. He was also pastor of the Reformed church at Leiden (1637–45). He died at Leiden.
His Kerckelycke Geschiedenissen (Leiden 1650) was an important work on Calvinist church histories. In it he commented on the work of Johannes Uytenbogaert, who had published a Remonstrant Church History in 1646. His own distinctive view traced the Protestant Reformation back to Wessel Gansfort, and claimed that the doctrine of election in Philipp Melanchthon and Heinrich Bullinger was compatible with the outcome of the Synod of Dort.