Fritz Pregl (in Slovene also Friderik Pregl) (3 September 1869–13 December 1930), was an Austrian chemist and physician from a mixed Slovene-German-speaking background.

Pregl started his career as physician after he studied medicine at the University of Graz. At the end of his research, he had lowered the minimal amount of substance necessary for the analysis process by a factor of 50.
He won the Nobel Prize in Chemistry in 1923 for making important contributions to quantitative organic microanalysis, one of which was the improvement of the combustion train technique for elemental analysis.
He died in Graz, Austria in 1930.