Ambrosius Pelargus (c. 1493 – 5 July 1561) was a German Dominican theologian.
His polemical efforts were directed principally against the Anabaptists, the Iconoclasts, and those who rejected the Mass.
Pelargus was a humanist name, from the Greek pelargon, meaning stork; his real name is given as Storch.
He attended the Diet of Worms (1540) and the Council of Trent in 1546, as theologian and procurator of the Archbishop of Trier.
When the Council was transferred to Bologna in 1547, Emperor Charles V, incensed against Pelargus because he had favoured the transfer, induced the archbishop to recall him, but the latter chose him again as his theologian in 1561.