Ernst Kunibert Zinner (30 January 1937 – 30 July 2015) was an Austrian astrophysicist, known for his pioneering work in the analysis of stardust in the laboratory. He long had a position in the United States at the Laboratory for Space Physics (later part of the McDonnell Center for the Space Sciences) at Washington University in St. Louis, Missouri, where he had earned his doctorate. He came to the United States in the 1960s for graduate work. In addition, Zinner regularly taught at European universities, and other American institutions.

Zinner was born on 30 January 1937 at Steyr, Austria, a small town about 100 miles west of Vienna. Although his father, Kunibert Zinner, was a renowned sculptor, Ernst was more interested as a boy in nature and science. Zinner's four younger siblings, and other relatives, live in Austria.

While on sabbatical later in his career, he met Brigitte Wopenka, a faculty member of the Institute of Analytical Chemistry in Vienna. She returned with him to the United States and they married in 1980. They had a son.

Zinner obtained an undergraduate degree in physics from the Vienna University of Technology and started working. In the mid-1960s, he moved to St. Louis, Missouri to attend Washington University for graduate work. He earned his Ph.D. there in 1972 in high energy physics.

That year he was invited by Robert M. Walker to work at the Laboratory for Space Physics (later part of the McDonnell Center for the Space Sciences) at Washington University.

He also held positions at:

Zinner continued to work at the McDonnell Center for the Space Sciences for the rest of his career, in 1989 being named as a Research Professor of Physics and Earth and Planetary Sciences. He retired early in 2015.

Zinner was a member of the American Association for the Advancement of Science, the American Geophysical Union, and Sigma Xi. He was also a fellow of the American Physical Society, the Meteoritical Society, the Geochemical Society, and the European Association of Geochemistry.