Ignaz Kreidl (December 11, 1869 in Gratzen, Austria-Hungary – May 21, 1947 in New York City, NY, USA) was a chemist and industrialist living in Vienna, Austria. He held numerous patents related to the production and use of rare earths and the production of glass, enamels, and synthetic resins. In addition to founding the chemical company Vereinigte Chemischen Fabriken (VCF), he became a major shareholder in , a leading glass manufacturer.