Craig Allen Kletzing was an American plasma physicist and professor at the University of Iowa, known for his work in space plasmas and laboratory plasmas. He conducted pioneering work in kinetic Alfvén waves, developed instruments for various NASA missions, and taught college level physics.

Kletzing was a principal investigator of the Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) unit aboard NASA's Van Allen Probes, and a co-investigator of the electric and magnetic Fields Suite aboard NASA's Magnetospheric Multiscale Mission. In 2019, NASA selected to fund Kletzing's Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites (TRACERS) mission proposal as part of the agency's Small Explorer Program.