Jacob (or Jakob) Milich (also Mühlich; January 24, 1501 – November 10, 1559) was a German mathematician, physician and astronomer.He was born in Freiburg im Breisgau, where he received his education starting in 1513. He studied at Albert-Ludwigs-Universität in Freiburg im Breisgau under Desiderius Erasmus. He taught at Wittenberg, where he received an M.D. degree and became a professor of mathematics. His most important student there was Erasmus Reinhold.