Gladys Mercedes Nordenstrom-Krenek (May 23, 1924 – July 5, 2016) was an American composer. She studied under Austrian composer Ernst Krenek at Hamline University. She later married him in 1950. She sometimes worked with Krenek on projects. After his death in 1991, she founded the Ernst Krenek Institute in 1998 and Krems die Ernst Krenek in 2004 in Vienna, Austria. In 2006, Nordenstrom was awarded the Decoration of Honour for Services to the Republic of Austria. She was born in Mora, Minnesota.