Heinrich Wieleitner (31 October 1874 – 27 December 1931) was a German mathematician and historian of mathematics.
He became an honorary professor of mathematics at the University of Munich but for much of his career worked in school- and college-level education.
Wieleitner was born in Wasserburg and was educated at the Catholic seminaries at Scheyern and Freising in theology but took an interest in mathematics, joining the University of Munich.
Arnold Sommerfeld suggested that he do his habilitation, and so he held lectures on the history of mathematics at the University of Munich from 1928 and in 1930 he was made an honorary professor.
Wieleitner worked on an unfinished manuscript by Anton von Braunmühl (died in 1908[1]) on the history of mathematics after Braunmühl and Siegmund Günther had worked on a history, Geschichte der Mathematik, the first volume of which came out in 1908.