Anton Mavretic (11 December 1934 in Metlika, Slovenia – 21 November 2019) was a Slovene electrical engineer who worked in the United States.Mavretic was professor and research associate at the Center for Space Physics at Boston University.
He has been a corresponding member of Slovenian Academy of Sciences and Arts since June 2007.
In 1985 he founded his consulting firm SIAT of Boston LLC.
Mavretic worked for the MIT Center for Space Research under contract for NASA from 1972 to 1979 and contributed to the development of plasma spectrometers for Voyager 1 and Voyager 2 projects.