Klaus Keil (November 15, 1934 – February 25, 2022) was a professor at the School of Ocean and Earth Science and Technology (SOEST) at the University of Hawaiʻi at Mānoa.

Klaus pioneered the use of the electron microprobe to study meteorite samples.

[2] In 1988, Klaus won the Leonard Medal, which is awarded by the Meteoritical Society.

In 2006, he won the J. Lawrence Smith Medal, which is awarded by the National Academy of Sciences.

These awards are for his pioneering quantitative studies of minerals in meteorites and important contributions to understanding the nature, origin, and evolution of their parent bodies.