Wack, Casper a German Reformed minister, was born at Philadelphia in 1752. He began the study of theology under. Dr. Weyberg in his eleventh year, and received calls at the age of eighteen; but his licensure and ordination were deferred until the Classis in Holland could be consulted, which occurred soon after. He labored extensively among the Germans who had fled from Rhenish Prussia to Holland in 1705 and in 1707 sailed to Philadelphia, afterwards settling in New Jersey and Pennsylvania. He was pastor at Tohicken, Indian Field, and Great Swamp, Pa., from 1771 to 1773; the same, with the addition of Nacomixen, from 1773 to 1782; German Valley, Fox Hill, and Rockaway, N. J.; from 1782 to 1809, including services at Stillwater, Hardwick, and Knowlton; pastor at Germantown and Whitemarsh, Pa., from 1809 to 1821; Whitemarsh, from 1821 to 1823. During the Revolution he was a warm patriot. He died July 19, 1839. See Harbaugh, Fathers of the German Ref. Church, 2, 173 sq.