Hermann Karsten (3 September 1809 in Breslau – 26 August 1877 in Reinerz) was a German physicist and mineralogist.
He initially studied law at the University of Bonn, then switched to mathematics and sciences, receiving his doctorate from the University of Berlin with the dissertation De crystallographiae mathematicae problematibus nonnullis (1829).
Afterwards, he continued his education at the Königsberg Observatory as a student of astronomer Friedrich Wilhelm Bessel.
At Rostock he gave lectures in astronomy, physics and mineralogy as well as classes on mathematical subjects.
Among his numerous published works was an astronomical almanac for seafarers.