Johann Weiß may refer to:
Johann Baptist Weiß (priest) (1753–1800), Benedictine priest, teacher and playwright Johann Baptist Weiss (1820–1899), German historian Johann Baptist Weiss (1812–1879), German painter Johann Baptist Weiß (1814–1850), Austrian schoolmaster, organist and early tutor of Anton Bruckner Johann Jacob Weiss (c. 1662–1754), composer of lute music Johann Sigismund Weiss, the originally attributed composer of Flute sonata in D major (HWV 378) (c. 1707) Johann Weiss, see Pirate Party of Canada Johann Weiss, Viennese lawyer and WW1 veteran, executed by Eduard Roschmann