Gustav Adolph Kenngott (January 6, 1818 - March 7, 1897) was a German mineralogist.
Kenngott was born in Breslau. After being employed in the Hofmineralien-Cabinett atVienna. From 1857 to 1893, he was also full professor of mineralogy at the ETH Zurich and at the University of Zürich. He was distinguished for his researches on mineralogy, crystallography and petrology. In 1855, from the serpentine of Mount Zdjar near Schönberg in Moravia, Kenngott was the first to describe enstatite. In 1860, he identified a new mineral, giving it the name pisanite in honor of Felice Pisani. Kenngott died in Lugano.