Adam Weishaupt was born on 6 February 1748 in Ingolstadt[1][5] in the Electorate of Bavaria. Weishaupt's father Johann Georg Weishaupt (1717–1753) died[5] when Adam was five years old. After his father's death he came under the tutelage of his godfather Johann Adam Freiherr von Ickstatt[6] who, like his father, was a professor of law at the University of Ingolstadt.[7] Ickstatt was a proponent of the philosophy of Christian Wolff and of the Enlightenment,[8] and he influenced the young Weishaupt with his rationalism. Weishaupt began his formal education at age seven[1] at a Jesuit school. He later enrolled at the University of Ingolstadt and graduated in 1768[9] at age 20 with a doctorate of law.[10] In 1772[11] he became a professor of law. The following year he married Afra Sausenhofer[12] of Eichstätt.

After Pope Clement XIV’s suppression of the Society of Jesus in 1773, Weishaupt became a professor of canon law,[13] a position that was held exclusively by the Jesuits until that time. In 1775 Weishaupt was introduced[14] to the empirical philosophy of Johann Georg Heinrich Feder[15] of the University of Göttingen. Both Feder and Weishaupt would later become opponents of Kantian idealism.