Johann Joachim Lange (1670 in Gardelegen – 1744 in Halle) was a German Protestant theologian and philosopher.
Lange was educated in Leipzig, Erfurt and Halle.
He was influenced by Christian Thomasius and the pietist August Hermann Francke.
He became a professor of theology at Halle in 1709, and opposed the philosophy of Christian Wolff.
He died in Halle on 7 May 1744.
Lange wrote the hymn O God, what offering shall I give?, translated into English by John Wesley.His son, Samuel Gotthold Lange, was a noted poet.